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 [Search a list of Patent Appplications for class 525]   CLASS 525,SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
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SECTION I - CLASS DEFINITION

Class 525 provides for all processes or products wherein a solid polymer is chemically modified or admixed with an additional solid polymer. It also provides for processes or products involving nonsolid specified intermediate condensation products which are admixed with an additional specified intermediate condensation product or specified polymer forming ingredients. In addition, this class provides for vinyl alcohol polymers or modified forms thereof and for polyesters admixed with an ethylenic reactant.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

(A) Listed below are rules to be followed in placing patents into and in determining the appropriate subclasses to be searched in Class 525.

(1) ETHYLENIC POLYMERS — The following rules are applicable to subclasses 55-388.

(a) When a polymer derived from ethylenic reactants only is not specified as a liquid or terms which are generally regarded as indicating a liquid (e.g., wax, waxy, etc.) it will be regarded as being a solid (e.g., polyethylene, polystyrene, etc.).

(b) Products are classified on the basis of their preparation. A product identified by a structure is to be placed with the process of its preparation; for instance, a product identified, as illustrated below, and which product from the disclosures is prepared by the reaction of polyacryloamide and formaldehyde is classified on the basis of polyacryloamide reacted with formaldehyde in a case involving rubber (e.g., halogenated, etc.) classification is on the basis of a solid polymer derived from isoprene.

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(c) All subclasses are based on a process of mixing. Products, per se, therefore are classified on the basis of the process of mixing.

(d) All solid polymers (subclasses 191+) are classified on the basis of the initial solid polymer derived from ethylenic reactants (e.g., a mixture of a halogenated polybutadiene and polyethylene is classified as an original in subclass 232 rather than as a halogen containing reactant, for example, in subclass 213).

(e) A process of halogenating polybutadiene and subsequently blending same with polyethylene is classified as in (D) above.

(f) In those subclasses which require the combination of two or more reactants (e.g., subclass 165 or subclass 178, etc.) the two reactants need not be added simultaneously to the ethylenic polymer, nor need they be reacted together prior to addition with the ethylenic polymer. They may be added subsequently, or there may be an intermediate reactant which is not, per se, the type required in these subclasses (e.g., other than amine, polycarboxylic acid, polyol, etc.). However, if the intermediate reactant is provided higher in the schedule (e.g., isocyanate, polyepoxide) it is classified in the higher provided subclass, etc.

(g) Compositions which have been admixed and are not in a reacted state are classified on the basis of the reactants in the schedule hierarchy.

(h) The following rules apply to subclasses 100+, 107+, 123+, 132+, 153, 154+, 165+, and 178+. Each of the above subclasses provide for:

(i) The reaction of an ethylenic polymer and a saturated reactant required by that subclass or polymer thereof (e.g., aldehyde, phenols, etc.).

(ii) The physical blend of an ethylenic polymer and a solid polymer derived from a saturated reactant required by that subclass.

(iii) The physical blend of an ethylenic polymer and a solid polymer derived from at least one ethylenic reactant required by that subclass and at least one saturated coreactant.

(iv) The mixture of an ethylenically unsaturated polymer and a specified intermediate condensation product, specified polymer forming ingredients, or solid polymer thereof, which is other than solely derived from ethylenic materials and wherein an ingredient required by that subclass is ethylenic and is part of the specified intermediate condensation product, specified polymer forming ingredient system, or solid polymer; or wherein the material required by that subclass is ethylenic and is in addition to a solid polymer, polymer forming ingredient system, or intermediate condensation containing at least one saturated reactant.

(v) Excluded from these subclasses are those processes or products wherein an ethylenic polymer is admixed with ethylenic material (e.g., polyacrolein or acrolein) only or polymers thereof.

(vi) Included herein are those situations wherein a treatment is effected on a polymer with part of a specified polymer forming ingredient system and in which a later reactant is added which forms a specified polymer-forming ingredient system therewith. The ehtylenic reactant which is required by that subclass can be part of the polymer-forming ingredient system or it may be part of the specified intermediate condensation product.

(2) CONDENSATES - PROCESSES: The following rules are applicable to subclasses 389-540.

(a) Processes of preparing products are classified with the product in the absence of any specified process subclass.

(b) Processes of treating a previously treated product are classified on the basis of the original solid polymer originally formed, e.g., treating a starting halogenated polyamide with an epoxy is classified as an original in the first appearing subclass of the schedule that provides for treating a polyamide with a halogen or epoxy, etc. If the process of preparing the starting materials is not claimed and the claimed step is provided in a lower subclass than the process if claimed of preparing the starting material, then a cross-reference into the claimed process is appropriate, e.g., Schedule reads as follows:

Polyamide

. treating with halogen

. treating with epoxy

Claim reads:

Halogenated polyamide is treated with an epoxy. The original is placed into the halogen subclass and should be cross-referenced into the epoxy subclass. If, however, the steps of halogenating and epoxidizing are claimed, the original is placed into the halogenating subclass and a cross-reference into the epoxy subclass is deemed to be optional.

(c) When a condensate polymer is not specified as a solid or identified by properties which identify it as a solid e.g., melting point, etc., then it is considered a liquid and as such is treated as a reactant.

(d) When a condensate polymer is noted in generic terms or is identified by a trade name or manufacturer, it is to be regarded as follows:

polyester = reaction product of a saturated dicarboxylic acid or derivative and ethylene glycol.

polyamide = reaction product of a saturated dicarboxylic acid or derivative and a diamine.

polyamide = identified as a nylon 6 is the reaction product of a caprolactam.

polyphenyleneoxide = reaction product of a monohydric phenol.

polyarylene sulfide = polyphenylene sulfide reaction product of an alkali metal sulfide reactant and a halogenated aromatic reactant.

polyoxymethylene = formaldehyde polymer.

polycarbonate = reaction product of

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and a dihydric aromatic dialcohol.

polyurethane = reaction product of R-(N=C=X)2(X is chalcogen) and ethylene glycol.

polyurea = reaction product of R-(N=C=X)2(X is chalcogen) and a diamine.

novalac = reaction product of formaldehyde and a monohydric phenol.

resole = reaction product of formaldehyde and a monohydric phenol.

aminoplast = reaction product of formaldehyde and an amine.

phenoplast = reaction product of formaldehyde and a monohydric phenol.

(e) In a multistep process of treating a polymer the first appearing step of treating in the schedule array provides for the original placement.

Claim reads:

polyamide treated sequentially with X, Y, and Z

Schedule reads:

polyamide

. treating with y

. treating with z

. treating with x

The original with Y, which is the first appearing subclass in schedule

(f) In those processes wherein two reactants are required to treat a solid polymer material (e.g., polyamide treated with a polyol and a polycarboxylic acid, the polyol and carboxylic acid can be added concurrently, sequentially, or even an intermittent step of adding material between the addition of the polyol and polycarboxylic acid may be involved).

(g)(i) In a multistep process wherein materials are reacted together and an intermediate solid polymer is formed which is subsequently reacted, all of the materials recited up to the step of preparing the intermediate solid polymer are regarded as reactants in preparing a solid polymer, and all materials which are reacted with the intermediate solid polymer are regarded as treating agents.

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(ii) Reactants to prepare intermediate solid polymer are A, B, and D.

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Classified as original with (D) and cross-referenced to (C). In this situation (C) is regarded for cross-referencing purposes as if it were a solid.

(h) A process of preparing a reactable composition is classified on the basis of the reactants involved in preparing the composition.

(3) PRODUCTS - CONDENSATES

(a) All products must be classified on the basis of their preparation as indicated by the disclosure.

(b) When products are to be classified all rules to processes described hereinbefore are applicable.

(c) A method of preparing a polymerizable composition is classified as a process on the basis of the reactants recited in preparing the polymerizable composition.

(4) ETHYLENIC OR CONDENSATION POLYMERS For purposes of classification:

(a) A solid polymer is always considered as being a reactant.

(b) A solid polymer is always classified on the reactants utilized in its preparation, e.g., natural rubber is classified as based on isoprene.

(c) In this class once the solid polymer is identified, all modifications thereof are included in the indents thereunder "specified as mixed". For instance, mixing a solid polyphenylene oxide with a silicon modified polyester is classified in subclass 393. Subclass 393 provides for processes starting with or treating a solid polyphenylene oxide with a silicon containing reactant and subsequently admixing same with a silicon or nonsilicon containing polyester, or for processes of admixing a solid polyphe

nylene oxide with a silicon containing polyester, or treating a mixture of a solid polyphenylene oxide and polyester with a silicon containing reactant.

(d) Processes wherein two or more reactants (ethylenic or nonethylenic) are reacted at preferential conditions so that one reactant forms a solid polymer while the other reactant is substantially unchanged and which other reactant is then subsequentially reacted with the formed solid polymer are classified in Class 526, 527, or 528. When, however, such a product is admixed with an additional solid polymer, specified polymer forming ingredients, or with a specified intermediate condensation product it is proper for this class (525). When the product is derived from ethylenic monomers only and is identified as a block or graft polymer and is subsequently admixed with an additional solid polymer, specified intermediate condensation product, or specified polymer forming ingredients, it is classified in this class (525) as if it were a block or graft copolymer. When the patentee discloses that a polymeric mixture is prepared by the interpolymerization of two or more reactants, A + B polymer, AB + polymer A, etc., such a product or process is proper in Classes 526, 527, or 528.

(e) Aftertreatment of a solid inorganic polymer with an organic compound to form an organic group containing polymer is proper in Class 526, 527, or 528. To be proper for this class (525) a solid organic polymer must be chemically treated.

(f) Patents in subclasses 192-196, 337, 338, and 503-508 which recite "chemical treating agent" are classified as follows:

(i) A "chemical treating agent" for purposes of this class is a chemical material which is added to the formed polymer and which causes or is present during a process wherein a change in a bond of the polymer is effected.

(ii) These subclasses provide for all chemical aftertreatments of a previously formed polymer derived from only ethylenic monomers when such aftertreatments are performed in the presence of a chemical agent, including treatments that are performed with chemical agents that are not specific as to identity or amount of the chemical agent, with the exception of mere reference to cross-linking, curing, or vulcanizing.

(iii) Claims are classified in these subclasses on the basis of the first-appearing material utilized as part of the chemical agent. No attempt has been made to classify on the basis of the chemically active material and therefore all materials in a composition are regarded equally (e.g., diluent, reactant, catalyst, etc.).

(iv) Claims to a composition or method of preparing (e.g., polymer plus a chemical reactive material) are classified as if they were process claims and as if the actual process has gone to completion.

(g) This class (525) includes processes of preparing solid polymers or resinifiable intermediate condensation products from a mixture of reactants wherein one of the initial reactants is used in an excessive amount with the expressed purpose of being used in a subsequent step to form with an added reactant a specified polymer-forming mixture. The original reaction mixture must produce a solid polymer or resinifiable intermediate condensation product and the process must recite the addition of the added reactant which, together with the excess of original reactant, forms the specified polymer-forming ingredients.

(B) Listed below are lines between particular Clas 525 subclasses and other areas (e.g., other Class 525 areas or other Classes).

(1) Lines relative to subclases 192+

A chemical agent is a material which can react with the polymer to cause a modification in the polymer"s chemical structure. Proper for this subclass would be, e.g., chemical reactions as halogenation, sulfonation, nitration, vulcanization, etc. Additionally, the treating agent if an ethylenic reactant, may preferentially homo- or copolymerize with other reactants to produce additional polymers. A patent which claims both product and process for producing a polymeric mixture containing a graft copolymer starting with two ethylenically derived polymers and an ethylenic reactant, requires that the original be classified Class 525 subclasses 192+ and should be crossed into the graft copolymer subclasses 63+. See Class 523, subclasses 1+ for a mixture of polymers with nonpolymeric material whose only purpose is, e.g., to enhance processibility of the polymers, stabilize against deterioration or aid deterioration after a given time (prodegradant), or act as a nucleating or crystallizing agent, etc. Search Class 528, subclasses 480+ for the treating of polymeric mixture in order to destroy residual catalyst or remove or neutralizimpurities. However, the neutralization of a polymeric salt with an acid or base is classified here. Included here also are processes wherein one or more polymers are chemically aftertreated and subsequently blended with themselves or with other polymers.

(2) Lines relative to subclases 242+

Subclass 242+ and indented subclasses also contain polymers prepared from a combination of ethylenic reactants mixed with nonethylenic reactants when reacted in the presence of ethylenically polymerized polymers, e.g., ethylene-ethylene oxide copolymer, propylene-sulfur dioxide copolymer. However, for the process of mixing such polymers see this class, subclass 185. Product claims are classified on the basis of ethylenic reactants either in the polymerized or unpolymerized state and cross-referenced to the nonethylenic reactant as being specified materials in this class, subclasses 244+. Process claims, of course, are classified according to claimed specified materials and, if lacking, then they are classified on the basis of the product.

(3) Lines relative to subclases 267

This subclass excludes the presence of a preformed polymer derived from ethylenic reactants only. This subclass is to be clearly distinguished from subclass 244 wherein the solid polymer, whether or not prepared in situ, is contacted both by an ethylenic reactant and a specified material. In the present subclasses the in situ prepared polymer is contacted with an ethylenic reactant. Typically, the polymer is not isolated or purified but is further reacted with an ethylenic reactant. For example, styrene is contacted with lithium butyl catalyst which results in formation of lithium terminated polystyrene block. The in situ-prepared polymer is then reacted with butadiene to produce polybutadiene-polystyrene block copolymer.

(4) Lines relative to subclases 326.1 through 388

(a) The following rules apply in classifying a claim into this area of the Class 525 schedule:

(i) For purposes of clarification in this part of the schedule, subclasses 326.1 to 334.1 are deemed to be chemically modified product subclasses; and subclasses 337 to 388 are deemed to be chemical modification process subclasses.

(ii) Patents that claim a chemically treated product and process, wherein both the product and the process are specifically provided for in the schedule, are classified in the product area (326.1 to 334.1) and cross referenced to the process area (337 to 388).

(iii) Patents that claim both a product (326.1 to 334.1) and a provided for process (337 to 388) and wherein the product is claimed in process terms are classified on the basis of the product (326.1 to 334.1) and cross-referenced to the process (337 to 388) on the basis of the chemical treating agent first appearing in the classification hierarchy.

(iv) Patents that claim a chemically modified product solely in process terms are classified on the basis of the product (326.1 to 334.1) and are desireably cross-referenced to the process (337 to 388) on the basis of the chemical treating agent first appearing in the classification hierarchy.

(v) Patents that claim nominally vulcanized, cured, or crosslinked solid polymers from ethylenic monomers only, (or nominal process claims directed to vulcanizing, curing or cross-linking) are classified as polymers as appropriate in Class 526; see also Class 526, subclass 72 (1) Note (A8).

(vi) Patents that claim vulcanized, cured or cross-linked solid polymers from ethylenic monomers only, wherein the vulcanizing, curing or cross-linking agent is identified by an atom (e.g., sulfur containing vulcanizing agent, etc.), by an amount (e.g., cured using 2% by weight of a vulcanizing agent, etc.) or by a significant process step (e.g., cured by heating to a specific temperature in presence of a vulcanizing agent, etc.) are classified as chemically modified products (326.1 to 334.1).

(b) Claims to an aftertreated product are classified on the basis of the initial monomers or monomers that are polymerized; except where certain chemical modifications or chemical treating agents are specifically provided for as an indented subclass under a monomer. In certain cases this determination is made from the disclosure. An example of such a situation is a treated halogenated polyethylene wherein the disclosure recites halogenation of a previously formed polyethylene polymer. In this case, classification is made on the basis of polyethylene rather than on halogenated polyethylene.

(c) Vulcanizable compositions are not subject matter for this subclass unless prior to the vulcanization or cross-linking step there is present a chemically modified solid polymer derived from ethylenic monomers only.

(d) The final product need not contain an atom of the chemical treating agent employed. For example, polyvinyl chloride which has been treated with a dehalogenating agent, is classified in subclass 331.5.

(e) Examples of patent placement within this and the indented subclasses. Patentee claims:

(i) Polyethlyene which has been chlorosulfonated by treatment with SO2 and CL2 at elevated temperature and pressure. There are also claims directed to this process of chlorosulfonation of polyethylene. The original classification is in subclass 333.9 with a mandatory cross-reference to subclass 344. This represents an inversion of the classification rule and process versus product in hierarchy of class 526.

(ii) A vulcanizable polyethylene composition comprising a mixture of polyethylene and zinc oxide as vulcanizing agent. The original classification is with the process subclass 373 since this product claim does not encompass a chemically modified solid polymer.

(iii) A vulcanizable chlorosulfonated polyethylene composition comprising a mixture of chlorosulfonated polyethylene and zinc oxide as vulcanizing agent. Disclosure states that the chlorosulfonated polyethylene is prepared by modification of previously formed solid polyethylene. The original classification of this product is in subclass 333.9 since the product claim encompasses a chemically modified solid polymer, i.e., chlorosulfonated polyethylene.

(5) Lines relative to subclases 501.5

Class 525, subclass 501.5 provides for, e.g., mixtures of phenol-formaldehyde resin (SICP) with an ethylenic agent such as an unsaturated fatty acid glyceride or unsaturated fatty acid derived therefrom, e.g., linseed oil or linseed fatty acid, etc. However, a phenolic SICP (not described as a solid polymer) admixed with a saturated fatty glyceride or saturated fatty acid, e.g., coconut oil or coconut fatty acids, etc., is classified in Class 528, subclass 158.5, since Class 525, subclasses 50+ do not encompass an admixture of a liquid SICP with a chemical treating agent; therefore, when saturated fatty glycerides or saturated fatty acid derived therefrom are reactants in the system of this subclass there must additionally be present a complete system for Class 525, subclass 480.

(6) Lines relative to subclases 517.5

Class 525, subclass 517.5 provides for mixtures of SICP (e.g., aminoplast resin, etc.) with an ethylenic agent such as unsaturated fatty acid glycerides or unsaturated fatty acids derived therefrom, e.g., linseed oil or linseed fatty acid, etc. However, an aminoplast SICP (not described as a solid polymer) admixed with a saturated fatty glyceride or saturated fatty acid, e.g., coconut oil or coconut fatty acid, etc., is placed in Class 528, subclass 245.5 since Class 525, subclasses 50+ do not encompass an admixture of a liquid SICP with a chemical treating agent; therefore, when saturated fatty glycerides or saturated fatty acid derived therefrom are reactants in the system of this subclass there must additionally be a complete system for Class 525, subclass 509.

SUBCLASSES

[List of Patents for class 525 subclass 7]    7ETHYLENICALLY UNSATURATED REACTANT ADMIXED WITH A PREFORMED REACTION PRODUCT DERIVED FROM: (A) AT LEAST ONE POLYCARBOXYLIC ACID, ESTER, OR ANHYDRIDE; (B) AT LEAST ONE FATTY ACID GLYCEROL ESTER, A FATTY ACID OR SALT DERIVED FROM A NATURALLY OCCURRING GLYCERIDE, TALL OIL, OR A TALL OIL FATTY ACID:
 This subclass is indented under Class 520, subclass 1.  Subject matter which are polyester-unsaturated reactant mixtures wherein (a) the polyester is prepared from a polycarboxylic acid, ester, or anhydride, and a polyol, and at least one fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring gylceride, tall oil, or a fatty acid derived from tall oil, and (b) there is at least one unsaturated reactant other than solely fatty glyceride, an unsaturated fatty acid or salt derived from a naturally occurring fatty glyceride, tall oil, or an unsaturated fatty acid derived from tall oil, or mixtures thereof.
(1) Note. Dehydrated castor oil or dehydrated castor oil fatty acids are treated as if they were unsaturated naturally occurring glyceride or unsaturated fatty acids derived from naturally occurring fatty glycerides.
(2) Note. A buffering agent to improve storage stability is regarded as a catalytic agent and therefore treated as specified material.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for definitions of the terms "specified material" and "fatty acid".
  
[List of Patents for class 525 subclass 7.1]    7.1Mixed in the presence of a specified material:
 This subclass is indented under subclass 7.  Subject matter wherein a specified material is present.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "specified material".
  
[List of Patents for class 525 subclass 7.2]    7.2Mixed with silicon-containing reactant or polymer derived therefrom:
 This subclass is indented under subclass 7.  Subject matter wherein there is additionally present a silicon-containing reactant or a silicon-containing solid polymer, SICP, or SPFI therefrom.
  
[List of Patents for class 525 subclass 7.3]    7.3Mixed with aldehyde or derivative as reactant or polymer derived therefrom:
 This subclass is indented under subclass 7.  Subject matter wherein there is additionally present an aldehyde or derivative as reactant or a SP, SICP, or SPFI therefrom.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for definitions of the terms "aldehyde" and "aldehyde derivative".
  
[List of Patents for class 525 subclass 7.4]    7.4Mixed with previously formed solid polymer or SPFI:
 This subclass is indented under subclass 7.  Subject matter wherein there is additionally present another SP or SPFI system.
  
[List of Patents for class 525 subclass 8]    8ETHYLENICALLY UNSATURATED REACTANT ADMIXED WITH A PREFORMED REACTION PRODUCT DERIVED FROM: (A) AT LEAST ONE POLYCARBOXYLIC ACID, ESTER, OR ANHYDRIDE; (B) AT LEAST ONE POLYHYDROXY COMPOUND AND; (C) AT LEAST ONE NATURAL RESIN, PROTEIN OR BIOLOGICALLY ACTIVE POLYPEPTIDE, OR CARBOHYDRATE OR DERIVATIVE:
 This subclass is indented under Class 520, subclass 1.  Subject matter wherein an ethylenically unsaturated reactant is admixed with a preformed polyester formed from a polyol; polycarboxylic acid, ester, or anhydride; and a natural resin, protein, biologically active polypeptide, carbohydrate, or derivative.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54.1+,for a system under Class 525, subclass 50 containing chemically combined protein or biologically active polypeptide and a polyester or polyester forming SPFI system.
54.2+,for a preformed solid polyester (or polyester derived from ethylenic reactants only) chemically treated with a carbohydrate or derivative.
54.3+,for a previously formed solid polyester containing chemically combined carbohydrate admixed with a SP, SICP, or chemical treating agent.
54.4+,for a system under Class 525, subclass 50 containing chemically combined natural resin or derivative and a polyester or polyester forming SPFI system.
54.5+,for a system under Class 525, subclass 50 containing chemically combined coal, bituminous material or fatty still residue and a polyester or polyester forming SPFI system.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for definitions of the terms "natural resin derivative", "protein", "biologically active polypeptide", and "carbohydrate derivative".
527Synthetic Resins or Natural Rubbers,   100+ for polyesters containing chemically bound: cellular material derived from plants or animals; 200+ for protein or biologically active polypeptide; 300+ for carbohydrate or derivative; 400+ for lignin or tannin; 500+ for coal or bituminous material; 600+ for natural resin.
  
[List of Patents for class 525 subclass 10]    10ETHYLENICALLY UNSATURATED REACTANT ADMIXED WITH EITHER (A) A POLYMER DERIVED FROM A SATURATED DI- OR HIGHER ESTER OF A POLYCARBOXYLIC ACID AS SOLE REACTANT, OR (B) REACTION PRODUCT OF ONLY POLYCARBOXYLIC ACIDS OR ANHYDRIDES WITH ONLY COMPOUNDS HAVING AT LEAST TWO HYDROXY GROUPS AT LEAST ONE OF WHICH IS SATURATED AND WHEREIN THE REACTION PRODUCT FORMED IS NOT AFTERTREATED PRIOR TO ADMIXTURE WITH THE UNSATURATED REACTANT EXCEPT WITH A POLYCARBOXYLIC ACID POLYCARBOXYLIC ACID ANHYDRIDE, OR A POLYOL, AND WHEREIN NO SOLID POLYMER DERIVED FROM ETHYLENIC REACTANTS ONLY IS MIXED THEREWITH:
 This subclass is indented under Class 520, subclass 1.  Subject matter under involving a polymer derived from nonethylenic di- or higher esters of a polycarboxylic acid as sole reactant, or the reaction product of only polycarboxylic acids or anhydrides with only compounds having at least two hydroxy groups, at least one of which is saturated, mixed with at least one ethylenically unsaturated reactant and wherein the polymer or reaction product formed from the di- or higher ester or from the polycarboxylic acid or anhydride and polyhydroxy compound is not aftertreated prior to mixing with the unsaturated reactant except with a polycarboxylic acid, polycarboxylic acid anhydride, or a polyhydroxy compound, and wherein no solid polymer derived from ethylenic reactants only is mixed therein; processes of preparing or reacting the above mixtures and compositions resulting from the mixing or reacting processes.
(1) Note. Included herein are all polyester-unsaturated reactant mixtures defined above except those cases in which the document specified that a mere diester is formed.
(2) Note. Excluded from this subclass is a mixture of a polymer derived from an unsaturated carboxylic acid ester as sole reactant, e.g., diallyl phthalate, diallyl maleate, etc., and an ethylenic reactant.
(3) Note. Excluded from this and the indented subclasses are those unsaturated reactants which have been prereacted and are part of a specified polymer-forming system (e.g., liquid reaction product of unsaturated diisocyanate and a polyol, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

55+,for a solid polymer derived from ethylenic monomers only mixed with the polyester-unsaturated reactant mixture.
242+,for a mixture of ethylenic reactant with a polymer formed of ethylenic reactants only.
418+,for those instances wherein the polyester is treated with reactants other than those specified in the title of this subclass if a solid polymer is formed.

SEE OR SEARCH CLASS:

528Synthetic Resins or Natural Rubbers,   for those instances wherein the polyester is treated with reactants other than those specified in the title of this subclass if the polyester is not a solid.
  
[List of Patents for class 525 subclass 11]    11Mixed in presence of specified material or a polymerizable composition contains a specified material:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a di- or higher ester of a polycarboxylic acid as sole reactant or derived from a polycarboxylic acid or anhydride and polyhydroxy compound is mixed with an ethylenic reactant in the presence of a specified material which is not a reactant or wherein the polymerizable polyester-unsaturated reactant composition contains a specified material.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "specified material". The term as used usually includes solvents, catalysts, inhibitors, accelerators, etc.
  
[List of Patents for class 525 subclass 12]    12Specified material contains boron or silicon atom:
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains a silicon or boron atom.
  
[List of Patents for class 525 subclass 13]    13Specified material contains metal atom other than from group IA metal atom (Li, Na, K, Rb, Cs, Fr):
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains a metal atom other than Group IA metal atom (Li, Na, K, Rb, Cs, Fr).
  
[List of Patents for class 525 subclass 14]    14Material contains group IB metal atom (Cu, Ag, Au):
 This subclass is indented under subclass 13.  Subject matter wherein the specified material contains a Group IB metal atom (Cu, Ag, Au).
  
[List of Patents for class 525 subclass 15]    15Material contains group IIB metal atom (Zn, Cd, Hg) or IIIA metal atom (Al, Ga, In, Tl):
 This subclass is indented under subclass 13.  Subject matter wherein the specified material contains a Group IIB or IIIA metal atom (Zn, Cd, Hg, Al, Ga, In, Ti).
  
[List of Patents for class 525 subclass 16]    16Material contains group VB metal atom (V, Nb, Ta):
 This subclass is indented under subclass 13.  Subject matter wherein the specified material contains a Group VB metal atom (V, Nb, Ta).
  
[List of Patents for class 525 subclass 17]    17Material contains group VIII metal atom (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt):
 This subclass is indented under subclass 13.  Subject matter wherein the specified material contains a Group VIII metal atom (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt).
  
[List of Patents for class 525 subclass 18]    18Material contains group IVA metal atom (Ge, Sn, Pb):
 This subclass is indented under subclass 13.  Subject matter wherein the specified material contains a Group IVA metal atom (Ge, Sn, Pb).
  
[List of Patents for class 525 subclass 19]    19Material contains group IIA metal atom (Be, Mg, Ca, Sr, Ba, Ra):
 This subclass is indented under subclass 13.  Subject matter wherein the specified material contains a Group IIA metal atom (Be, Mg, Ca, Sr, Ba, Ra).
  
[List of Patents for class 525 subclass 20]    20Specified material contains phosphorus atom:
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains phosphorus atom.
  
[List of Patents for class 525 subclass 21]    21Specified material contains ketone group:
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains a ketone group.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "ketone".
  
[List of Patents for class 525 subclass 22]    22Specified material contains an aldehyde or derivative thereof:
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains an aldehyde group or is a derivative thereof.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary for a definition of the term "aldehyde derivative".
  
[List of Patents for class 525 subclass 23]    23Specified material contains sulfur atom:
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains a sulfur atom.
  
[List of Patents for class 525 subclass 24]    24Sulfur is part of heterocyclic ring:
 This subclass is indented under subclass 23.  Subject matter wherein a sulfur atom is present as part of a heterocyclic ring.
  
[List of Patents for class 525 subclass 25]    25
 This subclass is indented under subclass 11.  Specified material contains nitrogen atom: Subject matter wherein the specified material contains a nitrogen atom.
  
[List of Patents for class 525 subclass 26]    26Nitrogen is part of heterocyclic ring:
 This subclass is indented under subclass 26.  Subject matter wherein a nitrogen atom is part of a heterocyclic ring.
  
[List of Patents for class 525 subclass 27]    27Specified material contains a peroxy group, i.e., -O-O-:
 This subclass is indented under subclass 11.  Subject matter wherein the specified material contains a peroxy group, i.e., -O-O-.
  
[List of Patents for class 525 subclass 28]    28Mixed with -N C=X reactant or polymer derived therefrom (X is chalcogen):
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from di- or higher ester of polycarboxylic acid as sole reactant or derived from polycarboxylic acid or anhydride and polyhydroxy compound is mixed with an ethylenic reactant and, additionally, is mixed with a -N C=X reactant or polymer derived thereof (X is chalcogen).
(1) Note. The term -N C=X reactant includes blocked or masked isocyanates.
(2) Note. Included herein are polyester unsaturated monomer mixtures which are aftertreated with an isocyanate reactant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

395,for a discussion of the term -N C=X reactant, which includes blocked or masked isocyanates.
440.01,for those instances wherein a solid polyester is reacted with an isocyanate prior to mixing with an unsaturated reactant.
  
[List of Patents for class 525 subclass 29]    29Mixed with silicon-containing reactant or polymer derived therefrom:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a di- or higher ester of polycarboxylic acid as sole reactant or derived from polycarboxylic acid or anhydride and polyhydroxy compound is mixed with an ethylenic reactant and is additionally mixed with a silicon-containing reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 30]    30Mixed with a solid polymer or specified intermediate condensation product derived from at least one amine-, N-C(=X)- or N-S (-O)- containing reactant and at least one aldehyde or aldehyde-type reactant (X is chalcogen):
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a di- or higher ester of polycarboxylic acid as sole reactant or derived from polycarboxylic acid or anhydride and polyhydroxy compound is mixed both with an ethylenic reactant and with an amine and/or reactant containing a

Image 1 for class 525 subclass 30

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "amine", "aldehyde", or "aldehyde-type".
  
[List of Patents for class 525 subclass 31]    31Mixed with an 1,2-epoxy compound containing more than one 1,2-epoxy group per mole or polymer derived therefrom:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a di- or higher ester of polycarboxylic acid as sole reactant or derived from polycarboxylic acid or anhydride and polyhydroxy compound is mixed with an ethylenic reactant and additionally is mixed with an epoxy compound containing more than one 1,2-epoxy group per mole or polymer derived therefrom.
  
[List of Patents for class 525 subclass 32]    32Mixed with a phenolic reactant and an aldehyde or aldehyde-type reactant or reaction product thereof:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a di- or higher ester of a polycarboxylic acid as sole reactant or derived from polycarboxylic acid or anhydride and polyhydroxy compound is mixed with an ethylenic reactant and additionally is mixed with a phenol and an aldehyde or aldehyde-type reactant or the reaction product thereof.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for definitions of the terms "aldehyde", "aldehyde-type", "phenolic reactant", and the definition of "carboxylic acid or derivative" for a discussion of "polycarboxylic".
  
[List of Patents for class 525 subclass 32.1]    32.1Polymer derived from polycarboxylic acid and polyhydroxyl compound is derived from at least one polycarboxylic acid reactant which is a dimer or trimer of an ethylenically unsaturated aliphatic monocarboxylic acid having at least ten carbon atoms; or adducts of said unsaturated monocarboxylic acid with an alpha, beta ethylenically unsaturated carboxylic acid or derivative:
 This subclass is indented under subclass 10.  Subject matter wherein at least a portion of the polycarboxylic acid or anhydride is (a) a dimer or trimer of an ethylenic unsaturated aliphatic monocarboxylic acid having at least ten carbon atoms, or (b) adducts of said unsaturated monocarboxylic acid with an alpha, beta ethylenically unsaturated carboxylic acid or derivative.

SEE OR SEARCH THIS CLASS, SUBCLASS:

168+,for a system under Class 525, subclass 50 wherein the ethylenic group containing polycarboxylic acid or derivative is a dimer or trimer of an ethylenically unsaturated monocarboxylic acid having at least ten carbon atoms since these dimers and trimers are assumed to be ethylenically unsaturated materials unless otherwise specifically described as saturated or hydrogenated so as to substantially remove all residual unsaturation.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, under "fatty acid" for terms used in this subclass.
  
[List of Patents for class 525 subclass 32.2]    32.2Ethylenic reactant or polymer derived from polycarboxylic acid or anhydride and polyol is derived from a carbohydrate or derivative:
 This subclass is indented under subclass 10.  Subject matter wherein a carbohydrate or derivative is chemically incorporated into the system either as the ethylenic reactant, or as part of a polymer derived from a polycarboxylic acid or anhydride polyol, and a carbohydrate.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   subclasses 238.2+ for a polymer produced from an ethylenic monomer having carbohydrate or derivative chemically bonded thereto.
527Synthetic Resins or Natural Rubbers,   subclasses 300+ for polyester resins containing chemically bound carbohydrate or derivatives.
  
[List of Patents for class 525 subclass 33]    33Polymer derived from polycarboxylic acid and polyhydroxy compound is derived from at least one polycarboxylic acid containing at least three carboxyl groups or more than one anhydride group:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least one polycarboxylic acid containing at least three carboxyl groups or more than one anhydride group.
(1) Note. Included here also is a polycarboxylic acid containing an anhydride and a carboxylic acid.
  
[List of Patents for class 525 subclass 34]    34Polymer derived from polyhydroxy reactant and polycarboxylic acid is derived from at least one reactant containing at least three hydroxyl groups:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least one polyhydroxy compound containing at least three hydroxyl groups.
  
[List of Patents for class 525 subclass 35]    35Polymer derived from polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least two polycarboxylic acid reactants or two polycarboxylic acid anhydrides or mixture thereof:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least two polycarboxylic acid reactants or anhydride reactants or a mixture thereof.
  
[List of Patents for class 525 subclass 36]    36At least one of said polycarboxylic acid reactants or anhydrides contains ethylenic unsaturation:
 This subclass is indented under subclass 35.  Subject matter wherein at least one of the polycarboxylic acid or anhydride reactants contains ethylenic unsaturation.
  
[List of Patents for class 525 subclass 37]    37Polymer mixed with unsaturated reactant containing phosphorus atom:
 This subclass is indented under subclass 36.  Subject matter wherein the unsaturated reactant mixed with the polyester contains phosphorus.
  
[List of Patents for class 525 subclass 38]    38Polymer mixed with unsaturated reactant containing nitrogen atom:
 This subclass is indented under subclass 36.  Subject matter wherein the unsaturated reactant mixed with the polyester contains nitrogen.
  
[List of Patents for class 525 subclass 39]    39Polymer mixed with unsaturated reactant containing carboxylic acid, ester, salt, or anhydride group:
 This subclass is indented under subclass 36.  Subject matter wherein the unsaturated reactant mixed with the polyester is a carboxylic acid, ester, salt, or anhydride.
  
[List of Patents for class 525 subclass 40]    40Polymer mixed with unsaturated reactant containing aryl ring:
 This subclass is indented under subclass 36.  Subject matter wherein the unsaturated reactant mixed with the polyester contains an aryl ring (e.g., styrene, etc.).
  
[List of Patents for class 525 subclass 41]    41Polymer derived from polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least two polyhydroxy compounds:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least two polyhydroxy compounds.
  
[List of Patents for class 525 subclass 42]    42Polymer derived from polycarboxylic acid or anhydride and polyhydroxy compound is derived from polyhydroxy compound containing ether linkage:
 This subclass is indented under subclass 10.  Subject matter wherein a polymer derived from a polycarboxylic acid or anhydride and polyhydroxy compound is derived from a polyhydroxy compound containing at least one ether linkage (e.g., hydroxy terminated low molecular weight polyethylene oxide, etc.).
  
[List of Patents for class 525 subclass 43]    43Polymer derived from polycarboxylic acid or anhydride, and polyhydroxy compound wherein at least one of the reactants contains ethylenic unsaturation:
 This subclass is indented under subclass 10.  Subject matter wherein a solid polymer derived from polycarboxylic acid or anhydride and polyhydroxy compound is derived from at least one reactant containing ethylenic unsaturation.
  
[List of Patents for class 525 subclass 44]    44Polymer mixed with unsaturated reactant containing two or more unsaturated groups:
 This subclass is indented under subclass 43.  Subject matter wherein the unsaturated reactant mixed with the polyester contains at least two unsaturated groups.
  
[List of Patents for class 525 subclass 45]    45Wherein unsaturated reactant contains three nitrogen atoms in the same ring:
 This subclass is indented under subclass 44.  Subject matter wherein the unsaturated reactant mixed with the polyester contains three nitrogen atoms in the same ring.
  
[List of Patents for class 525 subclass 46]    46Polymer mixed with unsaturated reactant containing nitrogen atom:
 This subclass is indented under subclass 43.  Subject matter wherein the unsaturated reactant mixed with polyester contains a nitrogen atom.
  
[List of Patents for class 525 subclass 47]    47Unsaturated reactant contains nitrogen heterocycle:
 This subclass is indented under subclass 46.  Subject matter wherein an unsaturated nitrogen heterocyclic reactant is mixed with the polyester (e.g., N-Vinyl pyrolidone, etc.).
  
[List of Patents for class 525 subclass 48]    48Polymer mixed with unsaturated carboxylic acid, ester, salt, or anhydride:
 This subclass is indented under subclass 43.  Subject matter wherein the unsaturated reactant mixed with polyester is a carboxylic acid, ester, salt, or anhydride.
  
[List of Patents for class 525 subclass 49]    49Polymer mixed with unsaturated aromatic compound:
 This subclass is indented under subclass 43.  Subject matter wherein the unsaturated reactant mixed with the polyester contains an aryl ring (e.g., styrene, etc.).
  
[List of Patents for class 525 subclass 50]    50MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT WITH SPECIFIED INTERMEDIATE CONDENSATION PRODUCT OR SPECIFIED POLYMER-FORMING INGREDIENTS; MIXING OF SPECIFIED INTERMEDIATE CONDENSATION PRODUCT WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS:
 This subclass is indented under Class 520, subclass 1.  Subject matter which involves the mixing of a solid polymer with solid polymers, with a specified intermediate condensation product (SICP), with specified polymer-forming ingredients (SPFI), with an ethylenic reactant, or with a chemical treating agent; or the mixing of a specified intermediate condensation product with a diverse specified intermediate condensation product, with specified polymer-forming ingredients, or with an ethylenic reactant; or processes of producing, or the resultant product of any of the above mixtures. The above combinations may be tabulated in a more easily recognizable form as follows in (1) Note below.
(1) Note. Combinations proper for this subclass and its indents:
1. P1+P2
2. P + SICP
3. P + SPFI
4. P + ER
P = Solid polymer
5. P + CTA
6. SICP1+SICP2
7. SICP + SPFI
8. SICP + ER, wherein
P = Solid Polymer
SICP = Specified intermediate condensation product
SPFI = Specified polymer-forming ingredients
ER = Ethylenic reactant
CTA = Chemical treating agent
(2) Note. A polymer is a solid when so stated or when it is described in one or more of the following terms. This list is not to be taken as limiting a solid to the enumerated terms. Other terms in patents not noted below may be interpreted as being solid when proper description is given therein:
1. coagulated
2. brittle
3. ductile
4. Durran m.p.
5. elastic
6. elastomer
7. fiber-forming
8. friable
9. fusible
10. gum
11. meltable
12. melting point
13 millable
14. molten
15. pliable
16. powder
17. rubber
18. rubbery
19. thermoplastic
20. thermoset
A wax is not considered to be a solid even if defined by one or more of the above terms.
(3) Note. Specified intermediate condensation product is limited to the following:
(A) Reactants noted in categories 1-3 below either as enumerated or with additional reactants, with the proviso that at least one of the reactants noted in 1-3 must be saturated, or (B) to the materials having the formulas set forth in categories 4-6. It must be remembered for purposes of classification that the structural formulas noted in 4-6 below are methylol compounds or derivatives thereof and are to be regarded as being a mixture of an aldehyde and the appropriate other reactant or reactants, with the proviso that at least one of the reactants used in preparing the methylol compound be saturated. In this regard, a methylol phenol is classified as if it were a mixture of formaldehyde and phenol, and methylol urea is classified as if it were a mixture of formaldehyde and urea.
(1) Reaction of an aldehyde or aldehyde derivative and/or an amine or compound containing an N-C(=X)- or N-S(=O)- moiety (X is chalcogen).
(2) Reaction of an aldehyde or aldehyde derivative and a phenolic material.
(3) Reaction of an aldehyde or aldehyde derivative and a ketone.
(4) A compound containing

Image 1 for class 525 subclass 50

(5) A compound containing a

Image 2 for class 525 subclass 50

(6) A compound containing a

Image 3 for class 525 subclass 50

Y" and Y" are or hydrocarbon groups.
T - is an atom other than H or carbon of a carbon-substituted radical.
A - is a hydrogen or carbon atom and which carbon is bonded to only H, carbon, or single-bonded to oxygen atoms.
X - is H, part of an ether group, or an inorganic cation.
N -is two or more, B is one or more.
Z -is a H or carbon radical.
Compounds containing ethylenic unsaturation are not considered to be specified intermediate condensation products (see structures 4-6 under specified intermediate condensation products above) nor are methylol or methylol derivatives, per se.
(4) Note. Specified Polymer-Forming Ingredients are Limited to: Those materials listed below under fourteen (14) different categories wherein at least one of each necessary reactants be utilized and that at least one be saturated. The term "poly" as noted in the specified polymer-forming ingredients area below is meant to include only reactants which are either (1) monomeric and in any physical state, or (2) polymeric but in a nonsolid physical state. The term "poly" designates that at least two of the required functional groups are present. In the classification schedule the term "necessary ingredients" has been utilized is some subclasses to include the combination of materials enumerated below (1-14) which must be present to have specified polymer-forming ingredients.
(1) aldehyde or aldehyde derivative and a phenolic material
(2) aldehyde or aldehyde derivative and an organic amine. Compounds containing ethylenic unsaturation are not considered to be specified intermediate condensation products (see structures 4-6 above) nor are methylol or methylol derivatives, per se.
(3) aldehyde or aldehyde derivative and a -C-N(=X) containing moiety (X is chalcogen)
(4) aldehyde or aldehyde derivative and a hydrocarbon
(5) epoxides containing more than one 1, 2-epoxy group per mole
(6) organic compounds containing more than one -N=C=X (X is chalcogen atom) and an organic polyol
(7) organic compounds containing more than one -N=C=X (X is chalcogen) and an organic polyamine
(8) organic compound containing more than one -N=C=X (X is chalcogen) and a poly carboxylic acid or anhydride
(9) carbonic acid halocarbonate or a carbonate and a polyol
(10) hal-C(=O)-hal and a polyol
(11) polycarboxylic acid or derivative and a polyol
(12) polycarboxylic acid or derivative and a polyamine
(13) aldehyde or aldehyde derivative and a compound containing an organic N-S(=O)- moiety
(14) aldehyde or aldehyde derivative and a ketone
(15) Materials which, present in the composition are either claimed or disclosed as being coreactable to form a solid polymer.
(5) Note. An aldehyde derivative for purposes of this subclass includes (a) Compounds having a X-CH2OH group wherein X is other than carbon or hydrogen. Included herein are paraformaldehyde, methylol derivatives of urea, nylon, and polyacrylamide, etc.; (b) Heterocyclic compounds having only carbon and oxygen as ring atoms in an alternating manner and in equal amount, i.e., (O-)n; Included herein is trioxane; (c) Hexamethylenetetramine or its derivatives, as illustrated below. A derivative of this type requires the basic ring structure of hexamethylenetetramine but wherein the hydrogen atoms may have been replaced by other atoms.

Image 4 for class 525 subclass 50

(6) Note. Compounds having a methylol group (-CH2OH) bonded to atoms other than carbon, oxygen, or hydrogen are regarded for this subclass as being two compounds, one of which is formaldehyde. For instance, a methylol derivative of melamine is regarded as being a mixture of melamine and formaldehyde. Methylol urea is regarded as being a mixture of formaldehyde and urea.
(7) Note. Paraformaldehyde polymer is regarded as a formaldehyde reactant.
(8) Note. A resole is considered to be a specified intermediate condensation product even if the structure is recited. However, a novolak is considered to be a solid phenolaldehyde polymer.
(9) Note. When nonpolymeric reactants A, B, and C, none of which is a specified intermediate condensation product, are mixed simultaneously under controlled conditions such that in a first stage one or two (e.g., A and/orB) of the reactants are caused to react to form a solid intermediate condensation product and the other reactants are caused to react later in the process, the claim is classified on the basis of the reactants which were introduced initially and not on the intermediate solid product unless a material is added subsequent to the formation of the solid intermediate and prior to the reaction of the final reactants.
(10) Note. A specified intermediate condensation product has been limited to a condensation product of an aldehyde with at least one of phenol, phenol either, inorganic phenolate, N-C(=X)-, N-S(=O)- containing reactant (X is chalcogen) or ketone wherein the condensation product contains a plurality of methylol groups (-CH2OH) or the partially or fully etherified product thereof (-CH2OR). In those instances where it is unknown from the claims or disclosure whether methylol or etherified methylol groups are present, the document has been considered to have methylol groups and crossed to where it would be classified if no methylol groups were present.
(11) Note. For purposes of this class all solid polymers are regarded as being reactants.
(12) Note. Natural rubber is a solid polymer proper for this class. A natural rubber or modified form thereof is considered as if it were derived from a monomer containing two ethylenic groups, i.e., isoprene. See the Search Notes, infra.
(13) Note. In order for a patent to be proper for this subclass and its indents, there must be a Desire or Intent to produce a composition of two or more solid polymers. Similarly the other mixing or forming or reacting processes of this subclass and its indents require an ultimate Desire or Intent to produce a mixture or reaction product. See Classes 526 to 528 for processes of in the presence of a previously formed solid polymer as a specified material, where there is no intent to form a composition or reaction product therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

165+,for natural rubber + polyol + polycarboxylic acid or derivative.
232,for natural rubber + polybutadiene. This composition is considered as a mixture of two polymers, each of which is derived from ethylenic reactants only.
317+,for natural rubber + styrene reactant.

SEE OR SEARCH CLASS:

528Synthetic Resins or Natural Rubbers,   subclasses 480+ for removing contaminants or undesirable materials from a solid polymer and wherein the polymer is not chemically modified, and, for example, for heating of a solid polymer by admixing with a heated fluidized bed of another solid polymer there being no intebt to produce a composition).
  
[List of Patents for class 525 subclass 51]    51Effecting a change in a process in response to a measurement or test:
 This subclass is indented under subclass 50.  Subject matter wherein a process parameter is determined and some process parameter is altered in response to the determination.
(1) Note. A test or measurement performed by a human being with a subsequent control operation is proper herein.
(2) Note. Treating a material to a certain condition without a defined inanimate measurement, test, inspection, or control (e.g., temperature, pH, etc.) is not proper subject matter for this subclass.
  
[List of Patents for class 525 subclass 52]    52Utilizing a tubular or loop reactor:
 This subclass is indented under subclass 50.  Subject matter wherein a reaction is effected in a loop or tubular reactor.
(1) Note. A loop reactor for purposes of this subclass is an apparatus wherein reactant material is circulated in a continuous path within a single or multicoiled or spiraled structure which has at least one inlet and outlet means and at least one reaction zone.
(2) Note. A tubular reactor for purposes of this subclass is an apparatus wherein a reactant material flows in an essentially linear direction in a tube or series of interconnected tubes, which tube or tubes are of small diameter in relation to their length and wherein each tube has at least one inlet and outlet means and one or more reaction zones.
  
[List of Patents for class 525 subclass 53]    53Utilizing an apparatus with two or more physically distinct zones:
 This subclass is indented under subclass 50.  Subject matter wherein a reaction is effected in at least two or more physically distinct zones (e.g., regions, stages, etc.), said zones being part of a single reactor which has a plurality of such physically distinct zones or such zones may be part of separate reactors which are interconnected at some point.
(1) Note. For the most part, the patents herein relate to advancement of materials from one zone to another so as to effect progressive degree of reaction and which are usually advanced until the degree of reaction is brought to the desired state.
  
[List of Patents for class 525 subclass 54]    54Removing and recycling material from one zone to another:
 This subclass is indented under subclass 50.  Subject matter wherein a portion of material is removed from a zone wherein material is undergoing a reaction and the removed material either with something added to it, removed from it, or the removed material, per se, is added to a zone wherein a reaction is occurring.
  
[List of Patents for class 525 subclass 54.1]    54.1Containing chemically combined protein or biologically active polypeptide:
 This subclass is indented under subclass 50.  Subject matter wherein a protein or biologically active polypeptide is chemically combined with the polymer system.
(1) Note. The proteinaceous material can be present as a chemical constituent of a SP or SICP, as a reactant with a SP, SICP, or SPFI system, or as an ethylenic agent (in the case of a protein modified to have ethylenic groups).

SEE OR SEARCH CLASS:

528Synthetic Resins or Natural Rubbers,   the Glosssry, for the definition of "protein" and "biologically active polypeptide".
  
[List of Patents for class 525 subclass 54.11]    54.11Solid polymer treated by stepwise reaction with naturally occurring alpha or beta amino acid or a material which contains a residue of said amino acid, e.g., a functionally protected amino acid, etc.:
 This subclass is indented under subclass 54.1.  Subject matter wherein the biologically active polypeptide is generated by stepwise treatment of a preformed solid polymer with a naturally occurring alpha or beta amino acid or a material which contains a residue of said amino acid, or product of such a process.

SEE OR SEARCH CLASS:

435Chemistry: Molecular Biology and Microbiology,   appropriate subclasses for making and using enzymes.
  
[List of Patents for class 525 subclass 54.2]    54.2Previously formed solid polymer chemically reacted with carbohydrate or derivative:
 This subclass is indented under subclass 50.  Subject matter wherein a carbohydrate or derivative is chemically reacted with a previously formed solid polymer (e.g., includes solid (SICP, etc.).

SEE OR SEARCH CLASS:

528Synthetic Resins or Natural Rubbers,   the Glosssry, for the definition of "carbohydrate derivative".
  
[List of Patents for class 525 subclass 54.21]    54.21Cellulose or derivative as chemical reactant:
 This subclass is indented under subclass 54.2.  Subject matter wherein cellulose or a derivative of cellulose (e.g., carboxy methyl cellulose, etc.) is chemically reacted with a previously formed solid polymer.

SEE OR SEARCH CLASS:

528Synthetic Resins or Natural Rubbers,   subclass 35 for the definition of cellulose or derivative.
  
[List of Patents for class 525 subclass 54.22]    54.22Previously formed solid polymer is derived from N=C=X reactant or contains N=C=X group wherein X is chalcogen:
 This subclass is indented under subclass 54.21.  Subject matter wherein a N=C=X reactant is a precursor for the solid polymer or the solid polymer contains N=C=X groups, and wherein X is a chalcogen atom (i.e., oxygen, sulfur, selenium, or tellurium).
(1) Note. So-called "Blocked" isocyanates are included herein since presumably free N=C=X is regenerated prior to reaction.
  
[List of Patents for class 525 subclass 54.23]    54.23Previously formed solid polymer is derived from ethylenically unsaturated reactants only:
 This subclass is indented under subclass 54.21.  Subject matter wherein only ethylenically unsaturated compounds are precursors for the solid polymer.
  
[List of Patents for class 525 subclass 54.24]    54.24Starch, starch flour or meal, or derivative as chemical reactant:
 This subclass is indented under subclass 54.2.  Subject matter wherein the carbohydrate material is a starch, a starch containing flour or meal (i.e., farinaceous flour) or a derivative thereof.

SEE OR SEARCH CLASS:

528Synthetic Resins or Natural Rubbers,   subclass subclass 47 for a definition of starch or derivative.
  
[List of Patents for class 525 subclass 54.26]    54.26Previously formed solid polymer derived from ethylenic reactants only:
 This subclass is indented under subclass 54.24.  Subject matter wherein the previously formed solid polymer is derived solely from ethylenically unsaturated reactants.
  
[List of Patents for class 525 subclass 54.3]    54.3Previously formed solid polymer containing chemically combined carbohydrate admixed with a chemical treating or ethylenic agent, SPFI, SICP, or solid polymer:
 This subclass is indented under subclass 50.  Subject matter wherein a solid polymer having chemically bound carbohydrate (or derivative) is treated by admixing with any of (a) chemical treating agent, (b) ethylenic agent, (c) solid polymer, (d) SPFI, or (e) SICP.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of "carbohydrate derivative".
526Synthetic Resins or Natural Rubbers,   subclasses 238.2+ for solid polymers prepared by polymerization of ethylenically unsaturated monomers having carbohydrate or derivative chemically bonded thereto.
527Synthetic Resins or Natural Rubbers,   subclasses 300+ for solid polymer prepared from carbohydrates or derivatives wherein at least one of the reactants is saturated.
  
[List of Patents for class 525 subclass 54.31]    54.31Carbohydrates containing polymer is derived from starch, or starch containing flour or meal:
 This subclass is indented under subclass 54.3.  Subject matter wherein the carbohydrate is starch, farinaceous flour or meal or a derivative thereof.

SEE OR SEARCH CLASS:

524Synthetic Resins or Natural Rubbers,   subclass 47 for the definition of a starch or derivative or farinaceous flour or meal.
  
[List of Patents for class 525 subclass 54.32]    54.32Carbohydrate containing polymer derived from acrylonitrile:
 This subclass is indented under subclass 54.31.  Subject matter wherein the carbohydrate containing polymer is derived from acrylonitrile (e.g., a polymer of acrylonitrile modified starch, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

54.31,for a polymer derived from methacrylonitrile.
  
[List of Patents for class 525 subclass 54.4]    54.4Containing chemically combined natural resin or derivative thereof other than tall oil:
 This subclass is indented under subclass 50.  Subject matter wherein there is a chemically combined natural resin or natural resin derivative.
(1) Note. Natural resins include such materials as have customarily been employed as such in the paint, lacquer, varnish, adhesive, and ink trades. Examples of these materials are: shellac, rosin, abietic acid, etc.
(2) Note. Rosin derivatives are materials which retain the abietyl ring structure even though hydrogenated or substituted (e.g., zinc resinate, abietyl alcohol, disproportionated rosin, colophony, dehydroabietic acid, etc.).
(3) Note. The natural resin or derivative can be present as a chemical constituent of a SP or SICP, a reactant with a SP, SICP, or SPFI system, or as an ethylenic agent.
(4) Note. Tall oil, per se, is not treated herein as a natural resin unless a substantial rosin content is specifically stated; otherwise, tall oil as a reactant is treated as an unsaturated fatty acid in the subclasses herein below.
  
[List of Patents for class 525 subclass 54.41]    54.41Shellac:
 This subclass is indented under subclass 54.4.  Subject matter wherein the natural resin is shellac or a derivative thereof.
  
[List of Patents for class 525 subclass 54.42]    54.42Previously formed solid polymer chemically reacted with natural resin or derivative:
 This subclass is indented under subclass 54.4.  Subject matter wherein a natural resin or a derivative or a natural resin is chemically reacted with a previously formed solid polymer.
(1) Note. The previously formed solid polymer can itself contain chemically combined natural resin or derivative.
  
[List of Patents for class 525 subclass 54.44]    54.44At least one previously formed solid polymer derived from ethylenic monomers only:
 This subclass is indented under subclass 54.42.  Subject matter wherein at least one solid polymer is present which is derived from ethylenic monomers only.
  
[List of Patents for class 525 subclass 54.45]    54.45Previously formed polymer containing chemically combined natural resin or derivative admixed with an ethylenic agent or a chemical treating agent other than SICP or SPFI:
 This subclass is indented under subclass 54.4.  Subject matter wherein a solid polymer derived from a natural resin or derivative is subsequently admixed with a chemical treating agent or an ethylenic agent.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54.4,for a chemical treating agent which is a SICP or SPFI.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   subclass 238.3 for solid polymers derived from ethylenic monomer having a natural resin chemically bonded thereto.
527Synthetic Resins or Natural Rubbers,   subclasses 600+ for solid polymers derived from natural resin or derivative.
  
[List of Patents for class 525 subclass 54.5]    54.5Chemically combined coal, bituminous material, extract or derivative thereof; oil shale; or fatty still residue:
 This subclass is indented under subclass 50.  Subject matter wherein the resin system has chemically bound thereto coal, bituminous material or extract thereof or a fatty still residue.
(1) Note. Oil shale derivative similarly treated would be placed herein.
(2) Note. The material proper for this subclass (e.g., coal, etc.) can be present as a chemical constituent of a SP or SICP, a reactant with a SP, SICP, or SPFI system, or as an ethylenic agent (in the case of coal, etc., modified to have ethylenic groups).

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524Synthetic Resins or Natural Rubbers,   for subclasses 59 and 705 for a definition of chemically combined coal, bituminous material, extract or derivative thereof, oil shale, or fatty still residue.
526Synthetic Resins or Natural Rubbers,   subclass 290 for solid synthetic polymer derived from ethylenically unsaturated coal, bituminous material, extract or derivative thereof; or from unsaturated fatty still residue where all monomers present are ethylenically unsaturated.
527Synthetic Resins or Natural Rubbers,   subclass 500 for solid synthetic polymer derived from coal or bituminous material, extract thereof or fatty still residue.
  
[List of Patents for class 525 subclass 55]    55At least one solid polymer derived from ethylenic reactants only:
 This subclass is indented under subclass 50.  Subject matter which involves mixing of a solid polymer derived from ethylenic reactants only with (a) a solid polymer, (b) specified polymer-forming ingredients or a specified intermediate condensation product, or (c) a chemical treating agent or an ethylenic reactant; or processes of reacting or the product formed by any of the mixing operations or any of the reacting processes.
  
[List of Patents for class 525 subclass 56]    56Polyvinyl alcohol:
 This subclass is indented under subclass 55.  Subject matter involves polymeric products containing vinyl alcohol units, processes of preparing wherein the final desired product is a polymer containing vinyl alcohol units; composition of a polymer containing vinyl alcohol units and a solid polymer, specified polymer-forming ingredients, a specified intermediate condensation product, chemically reactive material, or ethylenic reactant; or processes of preparing such a composition; composition of a precursor polymer and a reactive material which, under disclosed conditions, will prepare a vinyl alcohol polymer and processes of preparing such a composition.
(1) Note. A vinyl alcohol-containing polymer requires at least three

Image 1 for class 525 subclass 56

(2) Note. Vinyl alcohol polymers for the most part herein are prepared by the partial hydrolysis or saponification of polymers of vinyl esters, particularly homo- or interpolymeric-vinyl acetate. Any subsequent chemical treatment to polyvinyl alcohol will be assumed to have left unreacted alcohol groups. For this reason, polymers such as polyvinyl acetal, polyvinyl butyral, etc., will be found here.
(3) Note. Claims to a polymer admixed with a chemically reactive material or the process of preparing such a composition are classified in this area as if the actual process has gone to completion. As such, these types of claims are classified in the appropriate indented process area, rather than on the basis of the final treated product.

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526Synthetic Resins or Natural Rubbers,   and in particular, subclass 202 for a process of polymerizing an ethylenic monomer in the presence of a vinyl alcohol polymer wherein there is no intent to react the vinyl alcohol polymer with the polymerizable monomer or to form a composition therewith.
528Synthetic Resins or Natural Rubbers,   subclasses 480+ for processes involving the treatment of a vinyl alcohol polymer-containing material, without destroying the integrity of the polymer.
  
[List of Patents for class 525 subclass 57]    57With solid polymer derived from ethylenic reactants only:
 This subclass is indented under subclass 56.  Subject matter wherein polyvinyl alcohol is mixed with at least one solid polymer derived from ethylenic reactants only, e.g., polymethyl methacrylate, etc.
  
[List of Patents for class 525 subclass 58]    58With specified intermediate condensation product, specified polymer-forming ingredients, or polymer thereof:
 This subclass is indented under subclass 56.  Subject matter wherein polyvinyl alcohol is mixed with a specified intermediate condensation product, specified polymer-forming ingredients, or polymers thereof.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "specified intermediate condensation product" and "specified polymer-forming ingredients."
  
[List of Patents for class 525 subclass 59]    59With ethylenic reactant:
 This subclass is indented under subclass 56.  Subject matter wherein poly-vinyl alcohol is mixed with an ethylenic reactant (e.g., acrylic acid, acrylamide, etc.).
  
[List of Patents for class 525 subclass 60]    60Interpolymers:
 This subclass is indented under subclass 56.  Subject matter drawn to polymeric products only, wherein vinyl acetate has been copolymerized with at least one coreactant and the resultant copolymer subsequently hydrolyzed to

Image 1 for class 525 subclass 60

  
[List of Patents for class 525 subclass 61]    61Chemical modification utilizing a chemical treating agent:
 This subclass is indented under subclass 56.  Subject matter drawn to processes of chemically modifying homopolymers and copolymers of vinyl alcohol using a chemical treating agent, e.g., treating polyvinyl alcohol with aldehydes to give polyacetate or with PC15 to substitute the hydroxyl group,with chlorine atoms, etc.
  
[List of Patents for class 525 subclass 62]    62Processes only of preparing polyvinyl alcohol:
 This subclass is indented under subclass 56.  Subject matter wherein a nonvinyl alcohol unit precursor polymer is modified so as to prepare a vinyl alcohol-containing polymer therefrom.
(1) Note. For the most part the patents herein relate to subsequent aftertreatment of polymeric vinyl carboxylates.

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61,for processes of chemically modifying a vinyl alcohol unit-containing polymer.
  
[List of Patents for class 525 subclass 63]    63Mixing of solid graft or graft-type copolymer with other solid polymers wherein one of said solid polymers is not derived from ethylenic reactants only; mixing of said polymer mixture with a chemical treating agent; or mixing of graft or graft-type copolymer with a specified intermediate condensation product or specified polymer-forming ingredients; or processes of forming or reacting; or the resultant product or any of the above operation:
 This subclass is indented under subclass 55.  Subject matter which involves mixing of a solid graft or graft-type copolymer with other solid polymer(s) wherein the solid polymer, graft, or graft-type copolymer(s) is not derived exclusively from ethylenic reactants; or mixing of said polymeric mixture with a chemical treating agent; or mixing of graft or graft-type copolymer with a specified intermediate condensation product or with specified polymer-forming ingredients, or polymer thereof; or processes of forming or the resultant product of any of the above mixtures.
(1) Note. A nonethylenically polymerized solid graft, solid graft-type or nongraft polymer is one which was obtained as a solid other than from ethylenic polymerization exclusively. This would include, for example, such polymers as ethylene-carbon monoxide copolymer, ethylene-ethylene oxide block copolymer, caprolactam-styrene graft copolymer and the typical poly condensation polymers (e.g., polyesters, polyamines and polyurethanes, etc.).
(2) Note. The product derived from the reaction of a solid polymer substrate from ethylenic reactants only and a nonethylenic reactant to form a graft or graft-type copolymer is not considered as being of the type derived from ethylenic reactants only. Similarly, the product obtained obtained from graft copolymerizing an ethylenic reactant onto a solid polymer not derived exclusively from ethylenic reactants is also not considered as being a graft or graft-type copolymer derived from ethylenic reactants only. For purposes of classification a polymer is classified as: (A) A graft copolymer when
(1) The structure is given, i.e., to a long solid polymer backbone (substrate) is attached a pendant (nonterminal) polymer or copolymer superstrate with at least three reactant units in length or,
(2) the copolymer is so named as a graft providing that the disclosure is otherwise silent as to the structure or, if structure is likewise recited, it is consistent with that required in A.1 above or,
(3) the structure can be ascertained from the following limiting process conditions: (a) The disclosure states there is a reaction between a solid polymerized unsaturated reactant and an unpolymerized unsaturated reactant in the presence of a catalyst or, (b) the disclosure does not state whether or not any reaction has occurred between the solid polymerized unsaturated reactant and the unpolymerized unsaturated reactant, but relates that a product is obtained which is inseparable by a variety of physical techniques such as, extraction, precipitation, ion exchange, etc. In the absence of one or more or these requirements the reaction is considered to produce a polymeric blend.
(B) A graft-type copolymer when
(1) The structure is given, i.e., to a long solid polymer backbone (substrate) possessing nonterminal active sites or functional groups is attached (grafted) through a chemical reaction with these functional groups or sites an ethylenic reactant containing one or more functional groups or active sites. The reaction product may or may not possess unsaturated pendant groups depending on the mode of chemical reaction. The following examples will illustrate this point

Image 1 for class 525 subclass 63

Image 2 for class 525 subclass 63

(2) The structure can be ascertained when:
(a) There is disclosed a reaction between the solid polymerized unsaturated reactant and the unpolymerized unsaturated reactant which reaction uses specific art-recognized terms (e.g., esterfication, acylation, sulfonylation, cyanoethylection, addition to, reaction or condensation with, halogenation, nitration, sulfonation, alkylation, amination, etc.). An example of these reactions would be:

Image 3 for class 525 subclass 63

(b) There is disclosed an interaction between two or more solid polymers through their respective nonterminal functional groups or through the use of an intermediate reactant or chemical agent (e.g., causing salt, ester, amide, urea formation). Examples of these reactions would be: (1) Contacting polypropylene and polyethylene with benzoyl peroxide (2) Contacting polyvinylamine and polyallylamine with glyoxal (3) Contacting chloromethylated polystyrene with polyvinylamine (4) Contacting polyacrylic acid with polyvinylamine In the absence of one or more of these requirements the reaction is considered to produce a polymeric blend.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the terms "specified intermediate condensation product" and "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 64]    64Solid graft or graft-type copolymer derived from ethylenic reactants only:
 This subclass is indented under subclass 63.  Subject matter wherein the solid graft or graft-type copolymer was derived from a solid polymer derived from only ethylenically unsaturated reactants which was subsequently reacted with ethylenic reactants, e.g., styrene and acrylonitrile graft-copolymerized onto poly (butadiene-styrene), etc.
(1) Note. The preparation of a graft copolymer from all or some of its constituents in the presence of a solid polymer derived from ethylenic reactants only would be classified elsewhere.
(2) Note. This subclass provides for all graft or graft-type copolymers wherein a solid polymer from ethylenic reactants only is treated with polymer-forming ingredients in any sequence. For instance, this subclass would provide for a graft or graft-type copolymer prepared by treating a solid polymer from ethylenic reactants only with ethylene glycol followed by reacting with maleic anhydride; or wherein the polymer is first reacted with maleic anhydride followed by reaction with ethylene glycol. This subclass also provides for graft or graft-type copolymers which are prepared by treating a solid polymer from ethylenic reactants only concurrently with ethylene glycol and maleic anhydride.

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193,for the process of grafting styrene and acrylonitrile onto polybutadiene in the presence of polyerthylene.
  
[List of Patents for class 525 subclass 65]    65With saturated 1,2-epoxy reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom; or with solid copolymer derived from at least one unsaturated 1,2-epoxy reactant wherein the epoxy reactant contains more than one 1,2-epoxy group per mole and at least one saturated reactant:
 This subclass is indented under subclass 64.  Subject matter wherein, in addition to the solid graft or graft-type copolymer derived from ethylenic reactants only, there is also present (a) a saturated polyepoxide reactant or polymer thereof, or (b) a solid polymer derived from at least one saturated reactant and at least one unsaturated 1,2-epoxy reactant, e.g., a mixture of butadiene-styrene-acrylonitrile graft copolymer with trioxaneglycol diglycidyl ether copolymer, etc.
(1) Note. A saturated polyepoxide is by definition a specified polymer-forming ingredient; and see Class 520 Glossary for the definition of other terms noted as specified polymer-forming ingredients.
  
[List of Patents for class 525 subclass 66]    66With solid polymer derived from at least one nitrogen-containing reactant wherein at least one of the reactants forming the solid polymer is saturated; or with specified polymer-forming ingredients wherein at least one of the necessary ingredients contains a nitrogen atom or with a reaction product thereof; or with nitrogen-containing specified intermediate condensation product:
 This subclass is indented under subclass 64.  Subject matter wherein, in addition to the solid graft or graft-type copolymer derived from ethylenic reactants only, there is also present (a) a reactant or a solid copolymer derived from a nitrogen-containing reactant and wherein at least one of the reactants forming the solid copolymer is saturated, or (b) specified polymer-forming ingredients wherein at least one of the necessary polymer-forming ingredients contains a nitrogen atom and at least one of the necessary polymer-forming ingredients is saturated or a reaction product or condensate thereof, e.g.,a mixture of butadiene-styrene-acrylonitrile graft copolymer admixed with nylon 6, etc.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the term "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 67]    67With solid polymer derived from at least one hal-C(=O)-hal, O-C(=O)-O or hal-C(=O)-O- reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients is a hal-C(=O)-hal, O-C(=O)-O, or hal-C(=O)-O containing reactant or reaction product thereof; or with a SICP containing a hal-C(=O)- or O-C(=O)-O- group:
 This subclass is indented under subclass 64.  Subject matter wherein, in addition to the solid graft or graft-type, copolymer derived from ethylenic reactants only, there is also present (a) a solid polymer derived from a saturated hal-C(=O)-hal, O-C(=O)-O or hal-C(=O)-O- reactant or a solid copolymer derived from a hal-C(=O)-hal, O-C(=O)-O, or hal-C(=O)-O- containing reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (b) specified polymer-forming ingredients wherein at least one of the necessary polymer-forming ingredients contains a hal-C(=O)-hal, O-C(=O)-O, or hal-C(=O)-O- group and at least one of the necessary polymer-forming ingredients is saturated or a reaction product thereof.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the term "specified polymerforming ingredients".
  
[List of Patents for class 525 subclass 68]    68With solid polymer derived from at least one phenolic reactant wherein at least one of the reactants forming the solid polymer is saturated: or with specified polymer-forming ingredients wherein at least one of the necessary ingredients is a phenolic reactant or with a reaction product thereof; or with phenolic-containing specified intermediate condensation product:
 This subclass is indented under subclass 64.  Subject matter wherein, in addition to the solid graft or graft-type copolymer derived from ethylenic reactants only, there is also present (a) a solid polymer derived from a saturated phenolic reactant or a solid copolymer derived from a phenolic-containing reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (b) specified polymer-forming ingredients wherein at least one of the necessary polymer-forming ingredients contains a phenolic group and at least one of the necessary polymer-forming ingredients is saturated or a reaction product thereof.

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520Synthetic Resins or Natural Rubbers,   for the definition of the term "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 69]    69Solid graft of graft-type copolymer contains backbone derived from ethylenic reactants only:
 This subclass is indented under subclass 63.  Subject matter wherein the graft copolymer substrate is derived from ethylenically unsaturated reactants only, e.g., epsilon-caprolactone graft polymerized onto styrene-2-hydroxyethyl methacrylate copolymer, etc.
  
[List of Patents for class 525 subclass 70]    70Mixing of solid graft or graft-type copolymer derived from ethylenic reactants only with other solid polymer derived from ethylenic reactants only; or treating said mixture with chemical treating agent; or processes of forming or reacting; or the resultant product of any of the above operations:
 This subclass is indented under subclass 55.  Subject matter which involves the mixing of a solid graft-type copolymer derived from ethylenic reactants only with other solid polymers derived from ethylenic reactants only; or treating said polymer mixture with a chemical treating agent; or process of forming or reacting; or the resultant product of any of the above mixtures.
(1) Note. This subclass does not include those reactions which involve the preparation of a graft or graft-type copolymer in the presence of another solid ethylenic polymer.
(2) Note. This subclass provides for the mixing of two or more solid polymers at least one of which is a graft-type copolymer and both being derived from ethylenic reactants only. This subclass does not exclude the aftertreatments of ethylenic polymers or graft or graft-type copolymers with nonethylenic materials. However, classification in this area is based only on ethylenic materials (e.g., halogenated polybutadiene grafted with maleic anhydride). For purposes of classification in this area, only polybutadiene and maleic anhydride are to be considered in making the graft copolymer and not the halogenated polybutadiene.
(3) Note. "Solid polymer" as used in this subclass is generic and includes a nongraft polymer as well as a graft or graft-type polymer all of which were produced only from ethylenic reactants.

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63,for definitions of the terms "graft copolymer and graft-type copolymers".
193,for a final product mixture of polyvinylchloride and polybutadiene grafted to poltstyrene-acrylonitrile, obtained by aftertreating a mixture of polyvinyl chloride and polybutadiene with styrene and acrylonitrile.
313,for the same product when obtained from a mixture of polyvinyl chloride and butadine, styrene, and acrylonitrile.
  
[List of Patents for class 525 subclass 71]    71Contains two or more graft or graft-type copolymers or a graft or a graft-type copolymer and at least one block or block-type copolymer:
 This subclass is indented under subclass 70.  Subject matter wherein the mixture contains two or more graft or graft-type copolymers (or mixture thereof), a graft or graft-type copolymer, and at least one block or block-type copolymer.

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88,for the definition of a "block or block-type copolymer".
  
[List of Patents for class 525 subclass 72]    72Mixture contains solid polymer derived from reactants containing an atom other than C, H, O, N, or chlorine:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing an element other than carbon, hydrogen, oxygen, nitrogen, and chlorine.
  
[List of Patents for class 525 subclass 73]    73Mixture contains solid polymer derived from reactant containing nitrogen heterocycle:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing a nitrogen heterocycle (e.g., 2-methyl-5-vinylpyridine, n-vinyl pyrrolidone, etc.).
  
[List of Patents for class 525 subclass 74]    74Mixture contains solid polymer derived from reactant containing oxygen heterocycle:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing an oxygen heterocycle (e.g., maleic anhydride, glycidyl acrylate, etc.).
  
[List of Patents for class 525 subclass 75]    75Mixture contains solid polymer derived from reactant containing a fused- or bridged-ring system or from cycloaliphatic reactant:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant which contains a fused- or bridged-ring system, or a cycloaliphatic system (e.g., dicyclopentadiene, etc.).

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fused or bridged ring system".
  
[List of Patents for class 525 subclass 76]    76Mixture contains solid polymer derived from chlorine-containing reactant other than from vinyl(idene) chloride:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing halogen other than vinyl chloride or vinylidene chloride (e.g., 1-chloroacrylonitrile, etc.).
  
[List of Patents for class 525 subclass 77]    77Mixture contains solid polymer derived from reactant containing nitrogen other than from (meth)acrylonitrile:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing nitrogen other than from (meth)acrylonitrile (e.g., acrylamide, etc.).
  
[List of Patents for class 525 subclass 78]    78Mixture contains solid polymer derived from reactant containing carboxylic acid group:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing a carboxylic acid group (e.g., acrylic acid, etc.).
  
[List of Patents for class 525 subclass 79]    79Mixture contains solid polymer derived from reactant containing ether or hydroxyl group:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing an ether or hydroxyl group (e.g., vinyl ether, etc.).
  
[List of Patents for class 525 subclass 80]    80Mixture contains solid polymer derived from reactant containing carboxylic acid ester group:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with an ethylenic reactant containing a carboxylic acid ester group (e.g., methyl methacrylate, vinyl acetate, etc.).
  
[List of Patents for class 525 subclass 81]    81Reactant contains at least two ester groups:
 This subclass is indented under subclass 80.  Subject matter wherein the ethylenic reactant contains two ester groups (e.g., diallyl phthalate, etc.).
  
[List of Patents for class 525 subclass 82]    82Ester derived from a polyol:
 This subclass is indented under subclass 81.  Subject matter wherein the ethylenic carboxylic acid reactant ester is derived from a polyol (e.g., ethylene glycol diacrylate, etc.)
  
[List of Patents for class 525 subclass 83]    83Substrate polymer derived from hydrocarbon containing plural unsaturation:
 This subclass is indented under subclass 80.  Subject matter wherein the graft or graft-type copolymer"s substrate is derived from a hydrocarbon reactant containing plural unsaturation (e.g., butadiene, etc.).
  
[List of Patents for class 525 subclass 84]    84Polymer substrate derived from hydrocarbon reactants only:
 This subclass is indented under subclass 83.  Subject matter wherein the graft or graft-type copolymer"s substrate is derived only from ethylenic hydrocarbon reactants one of which must be plural unsaturated (e.g., butadiene, etc.).
  
[List of Patents for class 525 subclass 85]    85Polymer substrate derived from an unsaturated carboxylic acid ester:
 This subclass is indented under subclass 80.  Subject matter wherein the graft or graft-type copolymer"s substrate is a polymer derived from an ethylenically unsaturated carboxylic acid ester (e.g., methyl methacrylate, etc.).
  
[List of Patents for class 525 subclass 86]    86Mixture contains solid polymer derived from nonaromatic reactant containing plural ethylenically unsaturated groups:
 This subclass is indented under subclass 70.  Subject matter wherein a solid polymer is derived from or has been reacted with a plural unsaturated reactant which does not contain an aryl group (e.g., butadiene, etc.).
  
[List of Patents for class 525 subclass 87]    87Solid polymer other than graft or graft-type derived from nonaromatic plural ethylenically unsaturated reactant:
 This subclass is indented under subclass 86.  Subject matter wherein the mixture contains, in addition to the graft copolymer or graft-type copolymer, a nongrafted solid polymer derived from a plural ethylenically unsaturated reactant which is devoid of any aryl group (e.g., butadiene, etc.).
  
[List of Patents for class 525 subclass 88]    88Mixing of solid block or block-type copolymer with other solid polymer; mixing of said polymer mixture with a chemical treating agent; mixing of a block or block-type copolymer with specified intermediate condensation product or with specified polymer-forming ingredients; or processes of forming or reacting; or the resultant product of any of the above operations:
 This subclass is indented under subclass 55.  Subject matter which involves the mixing of a solid block or block-type copolymers with other solid polymer(s); mixing of said polymer mixture with a chemical treating agent; mixing of block or block-type copolymer with a specified intermediate condensation product or with specified polymerforming ingredients or their polymers; or processes of mixing or forming; or the resultant product of any of the above mixtures.
(1) Note. For purposes of classification a polymer is classified as:
(A) A block copolymer when
1. The structure is given, i.e., to a long polymer backbone is attached or coupled to one or both of its terminal ends one or more chemically dissimilar polymers at least three reactant units in length or,
2. the copolymer is named as a block providing that the disclosure is otherwise silent as to its structure or, if the structure is likewise given, it is consistent with that described above or,
3. the structure can be ascertained from the following limiting process conditions:
(a) Treating a nonterminated solid polymer, that is, one which is terminally active or "living", with an ethylenic reactant with subsequent polymerization to form additional blocks. The process may be continued to produce higher order block copolymers. For example, treating dilithiated polystyrene with butadiene to yield an ABA block copolymer.
(b) Two or more chemically dissimilar nonidentical solid polymer chain ends are coupled directly or through the use of a chemical agent. For example, the coupling of hydroxy-terminated solid polybutadiene with hydroxy terminated polyethylene glycol terephthalate using phosgene.
(B) A block-type copolymer when
1. The structure is given, i.e., to a long solid polymer backbone possessing terminally active sites, e.g., contains functional groups or is a "living polymer", etc., is attached or coupled through chemical reaction with those functional groups or sites an ethylenic reactant containing one or more functional groups or sites, for example, contacting hydroxy terminated polybutadiene with allyl isocyanate or,
2. two or more identical solid polymer chain ends are coupled directly or through the use of a chemical agent. For purposes here, identical means those polymer segments which contain the same backbone but differ (e.g., in stereoregularity, isotacticity syndiotacticity, atacticity, optical activity, or degree of polymerization). Thus, coupling lithium terminated polystyrene segments with molecular weights of 25,000 and 100,000 respectively with stannic chloride is proper for this subclass.
Failure to meet one or more of these requirements, the reaction is considered to produce a polymeric blend. For example, contacting lithium terminated polystyrene with ethylene oxide followed by blending with polyacrylic acid places the product blend in subclass 221.
(2) Note. Patents which describe the aftertreatment of solid polymer from ethylenic reactants only with a nonethylenic agent are classified according to the reactants first leading to formation of the solid polymer. However, if the aftertreating agent is an ethylenic reactant, it is given equal weight with these reactants used in making the solid polymer.

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191+,for a product wherein the same solid polymer from ethylenic reactants only is coupled utilizing a coupling agent and subsequently blended with a different solid polymer derived from ethylenic reactants only.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definitions of the terms "specified intermediate condensation product" and "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 89]    89Mixture contains two or more solid block or block-type copolymers:
 This subclass is indented under subclass 88.  Subject matter wherein the mixture contains at least two solid block copolymers or block-type copolymers.
(1) Note. There must be at least one solid polymer derived from ethylenically unsaturated reactants only. However, the required solid polymer from ethylenic reactants only need not be in block- or block-type form. An example of the mixture required for this subclass could consist of solid polyethylene and ethylene oxidebutyrolactone block copolymer. Unless stated to the contrary, in the absence of any disclosure, the polymer block shall be assumed to be a solid when derived from ethylenic reactants only and a liquid when derived other than only from ethylenic reactants.
  
[List of Patents for class 525 subclass 90]    90Mixture contains solid block copolymer wherein at least one block is derived from ethylenic reactants only and at least one block is derived from at least one saturated reactant:
 This subclass is indented under subclass 88.  Subject matter wherein the block copolymer contains at least one block ethylenic reactants only and at least one block from at least one saturated reactant, e.g., dimethylsiloxane-styrene block copolymer, etc.
  
[List of Patents for class 525 subclass 91]    91Block derived from at least one saturated reactant containing a heterocycle:
 This subclass is indented under subclass 90.  Subject matter wherein block polymer from at least one saturated reactant is derived from a heterocyclic reactant, e.g., butadiene-butyolactone block copolymer, etc.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "heterocyclic".
  
[List of Patents for class 525 subclass 92]    92Mixture contains solid polymer derived from at least one saturated reactant, specified intermediate condensation product, or specified polymer-forming ingredients:
 This subclass is indented under subclass 88.  Subject matter wherein the mixture contains a solid polymer from ethylenic reactants only, specified intermediate condensation product, specified polymer-forming ingredients or polymers thereof (e.g., polycarbonate from bisphenol A and phosgene, etc.).

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the terms "specified intermediate condensation product" and "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 93]    93Mixture contains solid polymer derived from reactant containing chalcogen:
 This subclass is indented under subclass 88.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant containing a chalcogen atom (O, S, Sc, and Te) (e.g., acrylic acid, etc.)
(1) Note. In this subclass and its indent(s), "solid polymer" is generic and is meant to include an ethylenic block, block-type, or nonblock polymer.
  
[List of Patents for class 525 subclass 94]    94Solid block or block-type copolymer derived from reactant containing carboxylic acid ester group:
 This subclass is indented under subclass 93.  Subject matter wherein the solid block or block-type copolymer contains a polymer block derived from a reactant containing a carboxylic acid ester group, e.g., methyl acrylate, etc.
(1) Note. In this subclass and its indent(s), "solid polymer" is generic and is meant to include an ethylenic block, block-type, or nonblock polymer.
  
[List of Patents for class 525 subclass 95]    95Mixture contains solid block or block-type copolymer derived from ethylenically unsaturated hydrocarbon reactants only at least one of which contains at least four carbon atoms:
 This subclass is indented under subclass 88.  Subject matter wherein the solid block or block-type copolymer is derived from ethylenic hydrocarbon reactants only and at least one of the hydrocarbon reactants contains at least four carbon atoms, e.g., a mixture of polyethylene with block (polyethylene-polybutene-1), etc.
(1) Note. In this subclass and its indent(s), "solid polymer" is generic and is meant to include an ethylenic block, block-type, or nonblock polymer.
  
[List of Patents for class 525 subclass 96]    96With solid polymer derived from reactant containing an atom other than C or H:
 This subclass is indented under subclass 95.  Subject matter wherein, in addition to the solid block or block-type copolymer, there is at least one solid polymer derived from a reactant containing elements other than carbon and hydrogen, e.g., a mixture of poly(styrene-acrylonitrile) with block (polybutadiene-polystyrene), etc.
  
[List of Patents for class 525 subclass 97]    97Mixture contains solid polymer derived from reactant containing a fused- or bridged-ring system:
 This subclass is indented under subclass 95.  Subject matter wherein the mixture contains a solid polymer derived from a reactant which contains a fused- or bridged-ring system, e.g., a mixture of block (polyethylene-polypropylene) with poly(butadiene-ethylidene-norbornene), etc.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the term "fused or bridged ring system".
  
[List of Patents for class 525 subclass 98]    98Solid block or block-type copolymer derived reactant containing plural unsaturation:
 This subclass is indented under subclass 95.  Subject matter wherein the block or block-type copolymer is derived from a plural ethylenically unsaturated reactant, e.g., a mixture of polystyrene with block (polybutadiene-polystyrene), etc.
  
[List of Patents for class 525 subclass 99]    99With solid polymer derived from reactant containing plural unsaturation:
 This subclass is indented under subclass 98.  Subject matter wherein, in addition to the solid block or block-type copolymer, there is present a solid polymer derived from a plural ethylenically unsaturated reactant, e.g., block (polybutadiene-polystyrene) with poly(butadiene-butene-1), etc.
  
[List of Patents for class 525 subclass 100]    100With saturated Si-C or Si-H reactant or polymer thereof; or with solid copolymer derived from at least one Si-C or Si-H reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with specified polymer-forming ingredients wherein at least one of the necessary ingredients contains a Si-C or Si-H bond or with a reaction product thereof; or with a specified intermediate condensation product containing a Si-H or Si-C bond:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a saturated reactant containing a Si-C or Si-H bond or a polymer thereof, or (b) a solid copolymer derived from a Si-C or Si-H-containing reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (c) specified polymer-forming ingredients wherein at least one of the necessary polymer-forming ingredients contains an Si-C or Si-H bond and at least one of the necessary polymer forming ingredients is saturated or a reaction product thereof, or (d) a specified intermediate condensation product containing an Si-C or Si-H bond.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "specified intermediate condensation product" and "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 101]    101Contacting with nonsilicon-containing specified intermediate condensation product, nonsilicon-containing specified polymer-forming ingredient, or polymer thereof; or with two or more solid polymers:
 This subclass is indented under subclass 100.  Subject matter wherein the solid polymer from ethylenic reactants only is contacted with a nonsilicon specified intermediate condensation product or nonsilicon polymer-forming ingredients or their polymers thereof; or is contacted with two or more solid polymers.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "specified intermediate condensation product" or "specified polymer-forming ingredients".
  
[List of Patents for class 525 subclass 102]    102Si-H or Si-C reactant contains an atom other than C, H, O, or Si bonded to a carbon atom:
 This subclass is indented under subclass 100.  Subject matter wherein the Si-H or Si-C bond-containing reactant or polymer thereof contains an atom other than C, H, or O bonded to carbon e.g., 3,3,3-trifluoromethyl propyl siloxane, etc.
(1) Note. Elements that are other than C, H, or O and are incorporated into the polymer by non Si-H a Si-C containing reactants are not considered for this subclass. The elements required must be part of a Si-H or Si-C reactant.
  
[List of Patents for class 525 subclass 103]    103Solid polymer from ethylenic reactants only is derived from heterocyclic reactant:
 This subclass is indented under subclass 100.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenically unsaturated heterocyclic reactant, e.g., N-Vinyl pyrrolidine, etc.
  
[List of Patents for class 525 subclass 104]    104Solid polymer from ethylenic reactants only is derived from reactant containing halogen atom:
 This subclass is indented under subclass 100.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenic reactant containing a halogen atom (e.g., tetrafluoroethylene, etc.).
  
[List of Patents for class 525 subclass 105]    105Solid polymer from ethylenic reactants only is derived from plural unsaturated hydrocarbon:
 This subclass is indented under subclass 100.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenic reactant which is a plural unsaturated hydrocarbon.
  
[List of Patents for class 525 subclass 106]    106Solid polymer from ethylenic reactants only is derived from unsaturated hydrocarbon:
 This subclass is indented under subclass 100.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenic hydrocarbon (e.g., styrene, etc.).
  
[List of Patents for class 525 subclass 107]    107With saturated 1, 2-epoxy reactant containing more than one 1, 2-epoxy group per mole or polymer derived therefrom; or with solid copolymer derived from at least one saturated reactant and at least one unsaturated 1, 2-epoxy reactant wherein the epoxy reactant contains more than one 1, 2-epoxy group per mole:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a reactant containing more than 1, 2-epoxy group or polymer thereof, or (b) a solid copolymer derived from at least one saturated reactant and an unsaturated reactant containing more than one 1, 2-epoxy groups per mole
(1) Note. The 1, 2-epoxy reactant may be an epoxidized solid polymer.
  
[List of Patents for class 525 subclass 108]    108Contacting two or more solid polymers derived from ethylenic reactants only with a poly 1, 2-epoxy-containing reactant; or contacting a solid polymer derived from ethylenic reactants only with a poly 1, 2-epoxy-containing reactant and subsequently contacting with an additional polymer derived from ethylenic reactants only:
 This subclass is indented under subclass 107.  Subject matter wherein two or more solid polymers derived from ethylenic reactants only are contacted with a reactant containing more than one 1, 2-epoxy group per mole, or polymer containing more than one epoxy group per mole; or contacting a solid polymer derived from ethylenic reactants only with said 1, 2-epoxy compound and subsequently contacting with an additional solid polymer derived from ethylenic reactants only.
  
[List of Patents for class 525 subclass 109]    109With phenolic reactant or polymer thereof and is free of 1, 2-epoxy groups:
 This subclass is indented under subclass 107.  Subject matter wherein there is an additional reactant present which is a phenolic material or polymer therefor and which material or polymer is free of any 1, 2-epoxy group (e.g., polyvinyl chloride mixed with a phenol-formaldehyde resin and the diglycidyl ether of bisphenol A, etc.).
  
[List of Patents for class 525 subclass 110]    110With reactant which is an aldehyde, aldehyde derivative, or polymer thereof, and which is free of an 1, 2-epoxy group (included herein are alkylated methylol groups):
 This subclass is indented under subclass 107.  Subject matter wherein there is an additional reactant present which is an aldehyde or aldehyde derivative, or polymer thereof, and which reactant is free of any 1, 2-epoxy groups.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "aldehyde derivative".
  
[List of Patents for class 525 subclass 111]    111With reactant which is free of an 1,2-epoxy group and which contains a -N=C=X group or polymer thereof (X is chalcogen); or with a polyol and a polycarboxylic acid or reaction product thereof which is free of an 1,2 epoxy group:
 This subclass is indented under subclass 107.  With reactant which is free of an 1, 2-epoxy group and which contains a -N=C=X group or polymer thereof (X is chalcogen); or with a polyol and a polycarboxylic acid or reaction product thereof which is free of an 1, 2-epoxy groups:Subject matter wherein there is an additional reactant present which is free of any 1, 2-epoxy group and which contains more than one -N=C=X (X is chalcogen) group or polymer thereof; or with a polyol and a polycarboxylic acid or derivative or with a reaction product thereof and which reactants or polymer are free of any 1, 2-epoxy groups, e.g., polyurethanes, polyesters, etc.
  
[List of Patents for class 525 subclass 111.5]    111.5With a reactant which is a fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil:
 This subclass is indented under subclass 107.  Subject matter wherein there is, in addition, at least one reactant which is a fatty acid glycerol ester, or a fatty acid or salt thereof derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil.
(1) Note. The contacting of the polymer with the fatty acid material can be prior, concurrent, or subsequent to contacting with the poly 1, 2-epoxide material.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fatty acid" and of other materials proper for this subclass.
  
[List of Patents for class 525 subclass 112]    112Contacting polymer from ethylenic reactants only with ethylenic reactant wherein said contacting is either concurrent with or subsequent to the contacting with the saturated poly 1, 2-epoxy reactant:
 This subclass is indented under subclass 107.  Subject matter wherein a solid polymer from ethylenic reactants only is contacted with an ethylenic reactant and said contacting is either concurrent with or subsequent to the contacting of the solid polymer from ethylenic reactants only with a saturated reactant containing more than one 1, 2-epoxy group per mole.

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107+,for contacting of a solid polymer from ethylenic reactants only with an ethylenic reactant only followed by contacting with a reactant containing more than 1, 2-epoxy group per mole.
  
[List of Patents for class 525 subclass 113]    113With nitrogen-containing reactant, or wherein the poly 1, 2-epoxy reactant contains a nitrogen atom:
 This subclass is indented under subclass 107.  Subject matter wherein there is, in addition, a nitrogen- containing reactant which can be added at any time to the solid polymer from ethylenic reactants only; or wherein the reactant which contains more than one 1, 2- epoxy group per mole contains nitrogen, e.g., a mixture of poly (styrene-acrylic acid), poly (epichlorohydrin-bisphenol A) and ethylene diamine.
  
[List of Patents for class 525 subclass 114]    114With additional heterocyclic reactant free of 1, 2-epoxy group:
 This subclass is indented under subclass 107.  Subject matter wherein there is, in addition, a non-1, 2-epoxy heterocyclic reactant which an be added at any time to the solid polymer from ethylenic reactants only (e.g., phthalic anhydride, etc.)
  
[List of Patents for class 525 subclass 115]    115Poly 1, 2-epoxy reactant contains an atom other than C, H, or O:
 This subclass is indented under subclass 107.  Subject matter wherein the reactant which contains more than one 1, 2-epoxy group per mole contains an element other than C, H, or O.
  
[List of Patents for class 525 subclass 116]    116Polymer derived from ethylenic reactants only derived from reactant containing an atom other than C, H, N, O, or halogen:
 This subclass is indented under subclass 107.  Subject matter wherein has been derived solid polymer from ethylenic reactants only or reacted with an ethylenic reactant which contains an element other than C, H, O, N, or halogen.
  
[List of Patents for class 525 subclass 117]    117Polymer derived from ethylenic reactants only derived from heterocyclic reactant:
 This subclass is indented under subclass 107.  Subject matter wherein the solid ethylenic polymer is derived from or has been reacted with an ethylenic reactant containing a heterocyclic ring.
  
[List of Patents for class 525 subclass 118]    118Polymer derived from ethylenic reactants only derived from reactant containing an alcohol or ether group (includes phenols):
 This subclass is indented under subclass 107.  Subject matter wherein the solid ethylenic polymer is derived from or has been reacted with an ethylenic reactant containing a hydroxyl group (includes aryl type).
  
[List of Patents for class 525 subclass 119]    119Polymer derived from ethylenic reactants only derived from reactant containing a -COOH group:
 This subclass is indented under subclass 107.  Subject matter wherein solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenic reactant containing a carboxylic acid group.
  
[List of Patents for class 525 subclass 120]    120Polymer derived from ethylenic reactants only derived from nonaromatic monoolefin:
 This subclass is indented under subclass 107.  Subject matter wherein the mixture contains a solid polymerized ethylenic reactant which is a nonaromatic monoolefin (e.g., ethylene, propylene, or butene-1).
  
[List of Patents for class 525 subclass 121]    121Polymer derived from ethylenic reactants only derived from reactant containing a halogen atom:
 This subclass is indented under subclass 107.  Subject matter wherein the solid polymer has been derived from or has been reacted with an ethylenic reactant containing a halogen atom.
  
[List of Patents for class 525 subclass 122]    122Polymer derived from ethylenic reactants only derived from unsaturated hydrocarbon:
 This subclass is indented under subclass 107.  Subject matter wherein the solid polymer has been derived from or has been reacted with an ethylenic hydrocarbon.
  
[List of Patents for class 525 subclass 123]    123With saturated -N=C=X (X is chalcogen) reactant or polymer thereof; or with solid copolymer derived from at least one -N=C=X reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with specified polymer-forming ingredients wherein at least one of the necessary ingredients contains a -N=C=X group or with a reaction product thereof; or with specified intermediate condensation product containing a -N=C=X group:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a saturated -N=C=X (X is chalcogen) reactant or a polymer thereof, or (b) a solid copolymer derived from a -N=C=X -containing reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (c) specified polymer-forming ingredients wherein at least one of the necessary ingredients contains a -N=C=X group and at least one of the necessary polymer-forming ingredients is saturated or a reaction product or condensate thereof, or (d) a specified intermediate condensation product which contains a -N=C=X group.
(1) Note. Included here under isocyanates are blocked isocyantes. See, in particular, under subclass 124.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a discussion of the terms "specified polymer-forming ingredients" and "specified intermediate condensation product".
  
[List of Patents for class 525 subclass 124]    124Blocked isocyanate reactant:
 This subclass is indented under subclass 123.  Subject matter wherein the -N=C=X containing reactant is blocked.

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520Synthetic Resins or Natural Rubbers,   Glossary for a definition of the term "blocked".
  
[List of Patents for class 525 subclass 125]    125Contacting two or more solid polymers derived from ethylenic reactants only with a -N=C=X Reactant or polymer thereof; or contacting a polymer derived from an ethylenic reactant only with a -N=C=X reactant or polymer thereof and subsequently adding thereto a solid polymer derived only from ethylenic reactants:
 This subclass is indented under subclass 123.  Subject matter wherein two or more solid polymers derived from ethylenic reactants only are contacted with a -N=C=X-containing reactant or polymer derived therefrom; or contacting a solid polymer derived from ethylenic reactant only with a -N=C=X-containing reactant or polymers therefrom and subsequently contacting with an additional solid polymer from ethylenic reactants only.
  
[List of Patents for class 525 subclass 126]    126Contacting solid polymer from ethylenic reactants only with ethylenic reactant wherein said contacting is either concurrent with or subsequent to contacting of said solid polymer with the -N=C=X reactant or polymer thereof:
 This subclass is indented under subclass 123.  Subject matter wherein a solid polymer from ethylenic reactants only is contacted with an ethylenic which is devoid of any -N=C=X group and wherein said contacting is either concurrent with or subsequent to the contacting of the solid polymer with the -N=C=X containing reactant; or wherein the solid polymerized ethylenic reactant is contacted simultaneously with an unsaturated-N=C=X-containing reactant and with a saturated coreactant and wherein the-N=C=X reactant and the saturated coreactant are necessary ingredients of a specified polymer-forming ingredient system.

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123+,for contacting a polymer from ethylenic reactant only followed by contact with a -N=C=X reactant.
  
[List of Patents for class 525 subclass 127]    127Contacting with a -N=C=X containing reactant which has been previously with an organic compound containing a hydroxyl, amine, or -C(=O)-O- group:
 This subclass is indented under subclass 123.  Subject matter wherein the solid polymer from ethylenic reactants only is contacted with a -N=C=X-containing reactant which -N=C=X reactant has been previously reacted with an organic reactant containing a hydroxyl, amine, or -C(=O)-O- group (X is chalcogen).

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "amine".
  
[List of Patents for class 525 subclass 128]    128-N=C=X reactant has been previously reacted with an organic amine:
 This subclass is indented under subclass 127.  Subject matter wherein the -N=C=X-containing reactant has been previously reacted with an organic amine.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of an "amine".
  
[List of Patents for class 525 subclass 129]    129Solid polymer from ethylenic reactants only derived from halogen-containing reactant:
 This subclass is indented under subclass 127.  Subject matter wherein the solid polymer has been derived from or reacted with an ethylenic reactant containing a halogen atom.
  
[List of Patents for class 525 subclass 130]    130Solid polymer from ethylenic reactants only derived from hydrocarbon reactant:
 This subclass is indented under subclass 127.  Subject matter wherein the solid polymer has been derived from or reacted with an ethylenic hydrocarbon.
  
[List of Patents for class 525 subclass 131]    131Contacting with -N=C=X-containing reactant and with additional organic reactant containing a hydroxyl or amine group:
 This subclass is indented under subclass 123.  Subject matter wherein the solid polymer from ethylenic reactants only is contacted both with a N=C=X-containing

Image 1 for class 525 subclass 131

(1) Note. The contacting with the two necessary reactants can be concurrent or in any other manner.

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123,for a process involving contacting a solid polymer from ethylenic reactants only with a solid polymer which is the reaction product of a -N=C-X-containing reactant and a

Image 2 for class 525 subclass 131

  
[List of Patents for class 525 subclass 132]    132With saturated phenolic reactant or polymer thereof; or with solid copolymer derived from at least one phenolic reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with specified polymer-forming ingredients wherein at least one of the necessary ingredients is a phenolic reactant or with a reaction product thereof; or with a specified intermediate condensation product containing a phenolic group:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a saturated phenolic reactant or a polymer thereof, or (b) a solid copolymer derived from a phenolic-containing reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (c) specified polymer-forming ingredients wherein at least one of the necessary ingredients contains a phenolic group and at least one of the necessary ingredients is saturated or a reaction product or condensate thereof, or (d) a specified intermediate condensation product containing a phenolic group.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "specified polymer-forming ingredients", "specified intermediate condensation product", and "phenolic reactant"
528Synthetic Resins or Natural Rubbers,   subclass 86 for a furthur discussion of phenols.
  
[List of Patents for class 525 subclass 133]    133Contacting two or more solid polymers with a phenolic reactant; or contacting a solid polymer with a phenolic reactant and subsequently contacting the treated polymer with an additional solid polymer:
 This subclass is indented under subclass 132.  Subject matter wherein either a solid ethylenically polymerized polymer is (a) contacted with one other solid polymer and a phenolic reactant, or (b) is contacted first with a phenolic reactant and subsequently with one other solid polymer.
(1) Note. The other solid polymer may be one derived other than only from ethylenic reactants (e.g., polyester, polyamide, etc.).
  
[List of Patents for class 525 subclass 133.5]    133.5With a reactant which is a fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil:
 This subclass is indented under subclass 132.  Subject matter wherein there is, in addition, at least one reactant which is a fatty acid glycerol ester, or a fatty acid or salt thereof derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of "fatty acid" and the materials proper for this subclass.
  
[List of Patents for class 525 subclass 134]    134Contacting additionally with aldehyde or aldehyde-type reactant or polymer therefrom:
 This subclass is indented under subclass 132.  Subject matter wherein the solid polymer from ethylenic reactants only is contacted, in addition, with an aldehyde or aldehyde-type reactant or polymer thereof.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "aldehyde-type".
  
[List of Patents for class 525 subclass 135]    135At least two distinct phenols, phenol ethers, inorganic phenolates, or mixtures thereof prior to reaction with aldehyde or aldehyde-type reactant:
 This subclass is indented under subclass 132.  Subject matter wherein the solid polymer from ethylenic reactants only is contacted with an aldehyde or aldehyde-type reactant or polymer thereof.
  
[List of Patents for class 525 subclass 136]    136Phenolic reactant prior to contact with aldehyde or aldehyde-type reactant contains an atom other than C, H, or O:
 This subclass is indented under subclass 134.  Subject matter wherein there is present prior to contacting with the aldehyde or aldehyde-type a phenolic reactant containing an element other than C, H, or O, e.g., 2,2"-methylenebis (4 -chloro-6-methylolphenol),

Image 1 for class 525 subclass 136

  
[List of Patents for class 525 subclass 137]    137Phenolic reactant prior to contact with aldehyde or aldehyde-type reactant contains at least two aryl rings each of which contains phenolic substituents:
 This subclass is indented under subclass 134.  Subject matter wherein there is present prior to contact with the aldehyde or aldehyde-type phenolic reactant containing at least two aryl rings each of which contains a phenolic OH group.
(1) Note. The rings may be fused as in 1, 8-dihydroxy naphthalene or as in bisphenol A. Diphenyl ether is not considered as having two phenolic moieties. However, the following two compounds identified below would be considered as having two phenolic moieties.

Image 1 for class 525 subclass 137

  
[List of Patents for class 525 subclass 138]    138With nonethylenic, nonaldehyde, or nonaldehyde-type reactant containing an atom other than C, H, or O:
 This subclass is indented under subclass 134.  Subject matter wherein there is present an additional reactant which is not ethylenic, nor an aldehyde or derivative thereof, e.g., pretreating phenol and formaldehyde with lead oxide and wherein the resulting lead oxide-containing condensate is blended with butyl rubber, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136,for a lead-containing phenolic used as a reactant.
  
[List of Patents for class 525 subclass 139]    139Solid polymer derived from ethylenic reactants only is derived from reactant containing at least two ethylenic groups:
 This subclass is indented under subclass 134.  Subject matter wherein the solid polymer is derived from or reacted with an ethylenic reactant containing plural unsaturated bonds.
  
[List of Patents for class 525 subclass 140]    140Phenolic reactant has at least two nuclear carbon atoms directly bonded to extracyclic carbon atoms which extracyclic carbon atoms are not part of a methylol group:
 This subclass is indented under subclass 139.  Subject matter wherein the phenolic reactant has at least two of its six nuclear carbon atoms bonded directly to extracyclic carbon atoms and which carbon atoms are not part of a methylol group, e.g., 3,4,5-trialkyl phenol, etc.
  
[List of Patents for class 525 subclass 141]    141Solid polymer from ethylenic reactants only is derived from both a reactant containing two ethylenic groups and an acyclic monoethylenic hydrocarbon:
 This subclass is indented under subclass 139.  Subject matter wherein the solid polymerized plural ethylenic reactant was interpolymerized with an acyclic monoethylenic hydrocarbon reactant, e.g., poly(butadiene-propylene), etc.
  
[List of Patents for class 525 subclass 142]    142Solid polymer derived from ethylenic reactants only is derived from a nitrogen-containing reactant:
 This subclass is indented under subclass 134.  Subject matter wherein the solid polymer is derived from or reacted with a nitrogen-containing ethylenic reactant, e.g., acrylamide, 2-vinylpyridine, etc.
  
[List of Patents for class 525 subclass 143]    143Solid polymer derived from ethylenic reactants only is derived from a reactant containing a carboxylic acid or derivative thereof:
 This subclass is indented under subclass 134.  Subject matter wherein the solid polymer is derived from or reacted with an ethylenic reactant containing a carboxylic acid group or derivative thereof, e.g., acrylic acid, maleic acid, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

142,wherein the acid derivative is nitrogen-containing (e.g., a nitrile, amide, etc.).
  
[List of Patents for class 525 subclass 144]    144Solid polymer derived from ethylenic reactants only is derived from a reactant containing at least one halogen atom:
 This subclass is indented under subclass 134.  Subject matter wherein the solid polymer is derived from or reacted with an ethylenic reactant containing a halogen-atom (e.g., tetrafluorethylene, vinyl(idene) chloride, etc.).
  
[List of Patents for class 525 subclass 145]    145Solid polymer derived from ethylenic reactants only is derived from an acyclic hydrocarbon:
 This subclass is indented under subclass 134.  Subject matter wherein the solid polymer is derived from or reacted with an unsaturated acyclic hydrocarbon.
  
[List of Patents for class 525 subclass 146]    146With a -O-C(=O)-O-, -O-C(=O)-hal or hal-C(=O)-hal group-containing reactant or polymer thereof:
 This subclass is indented under subclass 132.  Subject matter wherein the solid polymerized ethylenic reactant is contacted with a reactant containing a carbonate -O-C(=O)-O-, halocarbonate (-OCl) group or carbonyl halide (hal-C(=O)-hal) or polymers thereof.
  
[List of Patents for class 525 subclass 147]    147Two or more diverse phenolic reactants, or phenolic reactant contains an atom other than C, H, or O:
 This subclass is indented under subclass 146.  Subject matter wherein there are two or more different phenolic reactants, or a phenolic reactant which contains an element other than C, H, or O.
  
[List of Patents for class 525 subclass 148]    148Solid polymer derived from ethylenic reactants only is derived from a reactant containing a carboxylic acid or derivative thereof:
 This subclass is indented under subclass 146.  Subject matter wherein the solid polymer is derived from or reacted with an ethylenic reactant containing a carboxylic acid group or a derivative thereof (e.g., acrylic, acid, etc.).
  
[List of Patents for class 525 subclass 149]    149Contains ethylenic reactant other than from a solid polymer derived from ethylenic reactants only, e.g., reaction product from a phenol and unsaturated hydrocarbon, etc.:
 This subclass is indented under subclass 132.  Subject matter wherein there is an additional reactant which is ethylenically unsaturated or is an ethylenically unsaturated polymer not derived solely from ethylenic reactants.
  
[List of Patents for class 525 subclass 150]    150Phenolic reactant contains a phosphorus or sulfur atom or with phosphorus- or sulfur-containing reactant:
 This subclass is indented under subclass 132.  Subject matter wherein the phenolic reactant contains phosphorus or sulfur, or wherein a nonphenolic nonethylenic reactant contains phosphorus or sulfur.
  
[List of Patents for class 525 subclass 151]    151Solid polymer derived from ethylenic reactants only is derived from a reactant containing at least one halogen atom:
 This subclass is indented under subclass 132.  Subject matter wherein the solid polymer is derived from or reacted with an ethylenic reactant containing halogen.
  
[List of Patents for class 525 subclass 152]    152Solid polymer derived from ethylenic reactants only is derived from a reactant containing a polycyclic ring system or two or more ethylenic groups:
 This subclass is indented under subclass 132.  Subject matter wherein the solid polymer is derived from or reacted with an ethylenic reactant which contains a fused or bridged ring system or plural unsaturated groups (e.g., butadiene, dicyclopentadiene, etc.).

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fused or bridged ring system".
  
[List of Patents for class 525 subclass 153]    153With saturated ketone reactant or polymer thereof; or with solid copolymer derived from at least one ketone reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with specified polymer-forming ingredients wherein at least one of the necessary ingredients is a ketone or with a reaction product thereof; or with a specified intermediate condensation product containing a ketone group:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a saturated ketone reactant or a polymer thereof, or (b) a solid copolymer derived from a ketone-containing reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (c) specified polymer-forming ingredients wherein at least one of the necessary polymer-forming ingredients contains a ketone group and at least one of the necessary polymer-forming ingredients is saturated or a reaction product thereof, or (d) a specified intermediate condensation product which contains a ketone group.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "specified polymer-forming ingredients", "specified intermediate condensation product", and "ketone".
  
[List of Patents for class 525 subclass 154]    154With saturated aldehyde or aldehyde derivative (including methylol ethers or condensates) reactant or solid polymer thereof; or with solid copolymer derived from at least one aldehyde or aldehyde derivative reactant wherein at least one of the reactants forming the solid copolymer is saturated; or with specified polymer-forming ingredients wherein at least one of the necessary ingredients is an aldehyde or aldehyde derivative reactant or with a reaction product thereof, or with specified intermediate condensation product containing an aldehyde or aldehyde derivative:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a saturated aldehyde or aldehyde derivative (including methylol ethers or condensates) reactant or a polymer thereof, or (b) a solid copolymer derived from an aldehyde or aldehyde derivative reactant wherein at least one of the reactants forming the solid copolymer is saturated, or (c) specified polymer-forming ingredients wherein at least one of the necessary polymer-forming ingredients contains an aldehyde or derivative group and at least one of the necessary polymer-forming ingredients is saturated or a reaction product or condensate thereof, or (d) a specified intermediate condensation product which contains an aldehyde or aldehyde derivative group.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the terms "aldehyde", "aldehyde derivative", "specified polymer-forming ingredients", and "specified intermediate condensation product".
  
[List of Patents for class 525 subclass 155]    155Contacting two or more solid polymers derived from ethylenic reactants only with an aldehyde or aldehyde-type reactant; or contacting a polymer derived from ethylenic reactants only with an aldehyde or aldehyde-type reactant and subsequently contacting with a solid polymer derived from ethylenic reactants only:
 This subclass is indented under subclass 154.  Subject matter wherein a solid polymer from ethylenic reactants only is contacted with an aldehyde reactant, aldehyde derivative, or polymer thereof concurrently or subsequently to the contacting with another solid polymer from ethylenic reactants only.
  
[List of Patents for class 525 subclass 156]    156Contacting with a hydrocarbon and an aldehyde or aldehyde derivative as reactants at least one of which is saturated, their condensate or solid polymer thereof:
 This subclass is indented under subclass 154.  Subject matter wherein the solid polymer from ethylenic reactants only is contacted with a hydrocarbon and an aldehyde or aldehyde derivative as reactants, aldehyde-hydrocarbon condensate or the corresponding solid polymer thereof. The hydrocarbon reactant may not be a solid polymer from ethylenic reactants only (e.g., polyvinyl-naphthalene) which is then further condensed with formaldehyde. However, it can be vinyl naphthalene condensed with formaldehyde and subsequently contacted with a solid polymer derived from ethylenic reactants only.

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155,for the reaction of an aldehyde with a solid polymer from ethylenic reactants only subsequently mixed with a chemically dissimilar solid polymer derived from ethylenic reactants only.
  
[List of Patents for class 525 subclass 157]    157Contacting with an amine, a material containing a N-C(=X)- or N-S(=O)- (X is chalcogen) reactant and an aldehyde or aldehyde derivative at least one of which is saturated, their condensate or solid polymer thereof:
 This subclass is indented under subclass 154.  Subject matter wherein the polymer from ethylenic reactants only is contacted with an amine, a material containing a N-C(=X)- or N-S(=O) moiety and an aldehyde or aldehyde derivative as reactants, their condensate or solid polymer thereof (X is chalcogen).
  
[List of Patents for class 525 subclass 158]    158Reactant, condensate, or solid polymer contains an element other than C, H, N, or O; or wherein a co-reactant is not an aldehyde, or aldehyde-type reactant alcohol, amine, or reactant containing a N-C(=O)- group:
 This subclass is indented under subclass 157.  Subject matter wherein the condensate or corresponding solid polymer thereof contains an element other than C, H, O, or N; or wherein a co-reactant is not an aldehyde, aldehyde-type, alcohol, amine, or N-C(=O)- group-containing reactant.
  
[List of Patents for class 525 subclass 159]    159
 This subclass is indented under subclass 157.  Reactant derived from alcohol containing an aryl group or eight or more carbon atoms: Subject matter wherein the reactant is derived from an alcohol containing at least eight carbon atoms or one which contains an aromatic ring other than as a phenol, e.g., polymethyl acrylate and a condensate from n- octanol, formaldehyde and melamine, etc.
  
[List of Patents for class 525 subclass 160]    160Solid polymer derived from ethylenic reactants only contains an element other than C, H, O, or N:
 This subclass is indented under subclass 157.  Subject matter wherein the solid polymer is derived from or is reacted with an ethylenic reactant containing an element other than C, H, O, or N, e.g., vinyl sulfonamide, CH2=CH-SO2NH2, etc.
  
[List of Patents for class 525 subclass 161]    161Solid polymer derived from ethylenic reactants only derived from reactant containing a heterocyclic ring or a fused- or bridged-ring system excluding an anhydride group which produces the fused- or bridged-ring system or heterocyclic ring:
 This subclass is indented under subclass 157.  Subject matter wherein the solid polymer is derived from or reacted with ethylenic reactant containing a heterocyclic ring, fused- or bridged-ring system other than solely from cyclic anhydrides.
(1) Note. Excluded from this subclass are ethylenic reactants that contain a single heterocyclic ring and which ring is a cyclic anhydride. Also excluded from this subclass are those compounds which are bridged or fused solely by virtue of a cyclic anhydride ring fused or bridged to another ring. This subclass does include cyclic anhydride rings when in combination with other heterocyclic rings or compounds which may have a ring system such as,

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fused or bridged ring systems".
  
[List of Patents for class 525 subclass 162]    162Solid polymer derived from ethylenic reactant only derived from reactant containing hydroxyl or ether group:
 This subclass is indented under subclass 157.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or reacted with an ethylenic reactant containing an ether or hydroxyl group, e.g., 2-hydroxyethyl acrylate, etc.
  
[List of Patents for class 525 subclass 163]    163Solid polymer derived from ethylenic reactants only containing a carboxylic acid, ester, or anhydride group:
 This subclass is indented under subclass 157.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenic reactant containing a carboxylic acid, ester, or anhydride group.
  
[List of Patents for class 525 subclass 164]    164Solid polymer derived from unsaturated hydrocarbon:
 This subclass is indented under subclass 157.  Subject matter wherein the solid polymer from ethylenic reactants only is derived from or has been reacted with an ethylenic hydrocarbon.
  
[List of Patents for class 525 subclass 165]    165With polycarboxylic acid or derivative and a polyol at least one of which is saturated, a condensate or solid polymer thereof; or with solid polymer derived from at least one polycarboxylic acid or derivative and at least one polyol wherein at least one of the reactants forming the solid polymer is saturated:
 This subclass is indented under subclass 55.  Subject matter wherein, in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a solid polymer derived from at least one polycarboxylic acid or derivative and at least one polyol and wherein at least one of the reactants forming the solid polymer is saturated, or (b) polymer-forming ingredients wherein at least one of the necessary reactants is a polycarboxylic acid or derivative and at least one of the necessary reactants is a polyol and at least one of the necessary polymer-forming ingredients is saturated, or a reaction product thereof.
  
[List of Patents for class 525 subclass 166]    166Two or more solid polymers present other than derived from a polycarboxylic acid or derivative and a polyol:
 This subclass is indented under subclass 165.  Subject matter wherein there are present in the mixture two or more solid polymers other than those derived from condensations of a polycarboxylic acid or derivative and a polyol.
  
[List of Patents for class 525 subclass 167]    167Polycarboxylic acid or derivative or polyol contains an atom other than C, H, or O; or wherein a polycarboxylic acid or derivative or polyol or condensate thereof is reacted with a reactant containing atoms other than C, H, or O prior to blending with the solid polymer; or wherein a coreactant with the polycarboxylic acid or derivative or polyol contains an atom other than C, H, or O:
 This subclass is indented under subclass 165.  Subject matter wherein the polycarboxylic acid or derivative or polyol contains an element other than C, H, or O; or wherein the polycarboxylic acid or derivative, polyol or reaction product thereof is reacted with a compound containing elements other than C, H, or O prior to blending with the solid polymerized ethylenic reactant; or wherein the coreactant with the polycarboxylic acid, derivative, or polyol contains an element other than C, H, or O.
  
[List of Patents for class 525 subclass 167.5]    167.5With a reactant which is a fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring glyceride, tall oil , or a fatty acid derived from tall oil:
 This subclass is indented under subclass 165.  Subject matter wherein there is at least one reactant which is a fatty acid glycerol ester, or a fatty acid or salt thereof derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil.
(1) Note. The recited fatty material is reacted with the solid polymer derived from ethylenic reactants only; or with the polycarboxylic acid or derivative or polyol, or with the condensate or solid polymer thereof.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fatty acid" and of other materials proper for this subclass.
  
[List of Patents for class 525 subclass 168]    168Polycarboxylic acid or derivative, polyol, or other co-reactant contains an ethylenic group; or wherein a condensate thereof has been prepared from a polycarboxylic acid or derivative and a polyol and subsequently reacted with an ethylenic reactant:
 This subclass is indented under subclass 165.  Subject matter wherein the polycarboxylic acid or derivative thereof, polyol or other coreactant contains an ethylenic group; or wherein an ethylenic material contacts the polyol or polycarboxylic acid or reaction product thereof prior to contacting the solid polymer from ethylenic reactants only; and wherein said ethylenic material is not a solid polymer derived from ethylenic reactants only.
  
[List of Patents for class 525 subclass 169]    169Solid polymer derived from ethylenic reactants only derived from at least one reactant containing an atom other than C, H, or O:
 This subclass is indented under subclass 168.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant containing an element other than C, H, or O.
  
[List of Patents for class 525 subclass 170]    170Solid polymer derived from ethylenic reactants only derived from at least one reactant containing an oxygen atom:
 This subclass is indented under subclass 168.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant containing an oxygen atom.
  
[List of Patents for class 525 subclass 171]    171Solid polymer derived from ethylenic reactants only derived from at least one hydrogen reactant containing at least two ethylenic groups:
 This subclass is indented under subclass 168.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic hydrocarbon, e.g., butadiene, etc.
  
[List of Patents for class 525 subclass 172]    172Polycarboxylic acid or derivative contains three or more carboxylic acid groups or derivatives thereof, or wherein a polyol contains at least three hydroxyl groups:
 This subclass is indented under subclass 165.  Subject matter wherein the polycarboxylic acid contains at least three carboxylic groups or derivative thereof; or wherein the polyol contains at least three hydroxyl groups.
  
[List of Patents for class 525 subclass 173]    173From two or more polyols:
 This subclass is indented under subclass 165.  Subject matter wherein two or more polyols are utilized (e.g., mixture of propylene and butylene glycol, etc.).
  
[List of Patents for class 525 subclass 174]    174From two or more carboxylic acids or derivatives thereof:
 This subclass is indented under subclass 165.  Subject matter wherein two or more carboxylic acids or their derivatives are utilized.
  
[List of Patents for class 525 subclass 175]    175Solid polymer derived from ethylenic reactants only derived from at least one reactant containing an atom other than C, H, O, or hal:
 This subclass is indented under subclass 165.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant containing an element other than C, H, O, or halogen.
  
[List of Patents for class 525 subclass 176]    176Solid polymer derived from ethylenic reactants only derived from at least one reactant containing an oxygen atom:
 This subclass is indented under subclass 165.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant containing an oxygen atom.
  
[List of Patents for class 525 subclass 177]    177Solid polymer derived from ethylenic reactants only derived from unsaturated hydrocarbon:
 This subclass is indented under subclass 165.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant which is a hydrocarbon.
  
[List of Patents for class 525 subclass 178]    178With a polycarboxylic acid or derivative and a polyamine or the corresponding salt thereof; or with a lactam; or with an aminocarboxylic acid; or with the corresponding polymers; and wherein the monomer or polymer was derived from at least one saturated reactant:
 This subclass is indented under subclass 55.  Subject matter wherein in addition to the solid polymer derived from ethylenic reactants only, there is additionally present (a) a polycarboxylic acid or derivative and a polyamine at least one of which is saturated or a polymer or condensate thereof; or a saturated lactam or polymer thereof; or a saturated aminocarboxylic acid or polymer thereof, or an amine salt of a saturated carboxylic acid or polymer thereof; or (b) a solid polymer derived from at least one lactam, aminocarboxylic acid, amine salt of a polycarboxylic acid, or polycarboxylic acid and a polyamine and at least one of the reactants forming the solid polymer is saturated.
  
[List of Patents for class 525 subclass 179]    179Two or more solid polymers other than prepared from a polycarboxylic acid or derivative and a polyamine, a lactam, an aminocarboxylic acid or derivative, or from a polyamine salt of a polycarboxylic acid:
 This subclass is indented under subclass 178.  Subject matter wherein there are at least two solid polymers present which are other than derived from the reaction of a polyamine and a polycarboxylic acid or derivative, or from a lactam, or from an aminocarboxylic acid or derivative, or from an amine salt of a polycarboxylic acid, e.g., in subclass 178, e.g., an applicable mixture would be polystyrene, poly(methyl methacrylate) and nylon-6.
  
[List of Patents for class 525 subclass 180]    180Polycarboxylic acid or derivative contains three or more carboxylic acid groups; or polyamine contains three or more amino groups; or from an amino-containing polycarboxylic acid or derivative other than amine solely in salt form; or from polyamino carboxylic acid or derivative other than wherein amino groups are solely in salt form:
 This subclass is indented under subclass 178.  Subject matter wherein the polycarboxylic acid or derivative contains at least three carboxylic acid groups or derivatives, or wherein a polyamine contains at least three amino groups; or wherein the polycarboxylic acid contains at least one amine group excluding those appearing in the form of nonzwitterionic cation. Thus, structure I below is permitted while structure II is not, or from a carboxylic acid containing at least two amino groups excluding those appearing in the form of non-zwitterionic cation.

Image 1 for class 525 subclass 180

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520Synthetic Resins or Natural Rubbers,   Glossary for the definition of the term "carboxylic acid and amine group".
  
[List of Patents for class 525 subclass 181]    181With ethylenically unsaturated reactant; or reactant contains a heterocyclic ring other than solely as a lactam or cyclic anhydride of a polycarboxylic acid:
 This subclass is indented under subclass 178.  Subject matter wherein a reactant contains an ethylenic group; or reactant contains a heterocyclic ring other than solely as an anhydride or lactam, e.g., maleic acid.
(1) Note. Excluded from this subclass are ethylenic monomers that contain a single heterocyclic ring and which ring is a cyclic anhydride. This subclass does not exclude a cyclic anhydride ring when in combination with a noncyclic anhydride ring.

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178,for the situation wherein the ethylenic reactant may be introduced subsequent to the solid polymer.
  
[List of Patents for class 525 subclass 182]    182Solid polymer derived from ethylenically unsaturated reactant only is one derived from a reactant containing a heterocyclic ring and is other than solely a cyclic anhydride of a polycarboxylic acid:
 This subclass is indented under subclass 178.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant which is a heterocyclic compound other than solely as a carboxylic acid anhydride, e.g., N-vinylpyrrolidone, glycidyl methacrylate and N-vinylcarbazole, etc.
(1) Note. Excluded from this subclass are ethylenic monomers that contain a single heterocyclic ring and which ring is a cyclic anhydride. This subclass does not exclude a cyclic anhydride when in combination with a noncyclic anhydride ring.

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183,for a solid polymer derived from maleic anhydride.
  
[List of Patents for class 525 subclass 183]    183Solid polymer derived from ethylenically unsaturated reactant only is derived from a reactant containing a carboxylic acid or derivative:
 This subclass is indented under subclass 178.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant containing a carboxylic acid or derivative thereof.
  
[List of Patents for class 525 subclass 184]    184Solid polymer derived from ethylenically unsaturated hydrocarbon:
 This subclass is indented under subclass 178.  Subject matter wherein the solid polymer is derived from or has been reacted with an ethylenic reactant which is a hydrocarbon.
  
[List of Patents for class 525 subclass 185]    185With additional solid polymer derived from at least one nonethylenic reactant:
 This subclass is indented under subclass 55.  Subject matter wherein the solid polymer derived from ethylenic reactants only is contacted with an additional solid polymer derived from at least one nonethylenic reactant, e.g., a copolymer derived from carbon monoxide and ethylene, etc.
  
[List of Patents for class 525 subclass 186]    186At least one reactant which forms additional polymer contains a heterocyclic ring:
 This subclass is indented under subclass 185.  Subject matter wherein the additional solid polymer is derived from a heterocyclic reactant.
  
[List of Patents for class 525 subclass 187]    187Heterocyclic ring is an 1,2-epoxy ring:
 This subclass is indented under subclass 186.  Subject matter wherein the heterocyclic reactant is a 1,2-epoxy (oxirane) compound, e.g., epichlorohydrin, etc.
  
[List of Patents for class 525 subclass 188]    188At least one reactant which forms additional polymer contains a phosphorus atom:
 This subclass is indented under subclass 185.  Subject matter wherein the additional solid polymer is derived from a reactant containing phosphorus.
  
[List of Patents for class 525 subclass 189]    189At least one reactant which forms additional polymer contains a sulfur atom:
 This subclass is indented under subclass 185.  Subject matter wherein the additional solid polymer is derived from a reactant containing sulfur.
  
[List of Patents for class 525 subclass 190]    190At least one reactant which forms additional polymer contains a carboxylic acid or derivative:
 This subclass is indented under subclass 185.  Subject matter wherein the additional solid polymer is derived from a reactant which is a carboxylic acid or derivative.
  
[List of Patents for class 525 subclass 191]    191Polymer mixture of two or more solid polymers derived from ethylenically unsaturated reactants only; or mixtures of said polymer mixture with a chemical treating agent; or products or processes of preparing any of the above mixtures:
 This subclass is indented under subclass 55.  Subject matter which concerns mixing of two or more solid polymers derived from ethylenically unsaturated reactants only, a mixture of said polymer mixture with a chemical treating agent, or processes of forming or the resultant product of any of the above mixtures.
(1) Note. Excluded from this subclass are multi-step polymerization-postpoly­merization processes which occurs in the presence of a single preformed solid polymer from ethylenic reactants only and an ethylenic reactant which affords a polymeric mixture.
(2) Note. Placement of a patent in this subclass is on the basis of the ethylenic reactants used in the preparation of solid polymer and not on the basis of ethylenic reactants which may be reacted with a mixture of solid polymers from ethylenic reactants only.

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193,for metalation of po;ystyrene blended with polybutadiene which is subsequently contacted with butadiene.
242+,for lithiation of styrene in the presence of polyethylene to yield lithium. Terminated polystyrene followed by its reaction with butadiene to produce block (polybutadiene . polystrene) in admixture.
  
[List of Patents for class 525 subclass 192]    192Treating polymer or polymer mixture with a chemical treating agent other than solid polymer:
 This subclass is indented under subclass 191.  Subject matter drawn to processes of treating a polymer or polymer mixture with a chemical agent.
(1) Note. In the Class Definition of this class, see Lines With Other Classes and Within This Class, section II, B(1) for lines between this subclass and its indents.

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199,through 241, for a product which is the result of a treating process proper for this subclass and its indents.
  
[List of Patents for class 525 subclass 193]    193Agent contains an ethylenic group:
 This subclass is indented under subclass 192.  Subject matter wherein the treating agent is ethylenically unsaturated.
(1) Note. Included herein are polymers which were obtained only from ethylenic reactants as treating agents.

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70+,for a polymeric mixture containing a graft copolymer derived from ethylenic reactants only; or for a process or product obtained by treating an ethylenic reactant which reacts with the polymer and which resultant product is admixed with an additional solid polymer.
88+,for a polymeric mixture containing a block copolymer derived from ethylenic reactants only or for a process or product obtained by treating a mixture of polymers having functional terminal ends or with a coupling agent and subsequently contacting said product with an additional solid polymer.
  
[List of Patents for class 525 subclass 194]    194Agent is an organic material:
 This subclass is indented under subclass 192.  Subject matter wherein the chemical treating agent is organic material.
  
[List of Patents for class 525 subclass 195]    195Contains a metal atom:
 This subclass is indented under subclass 194.  Subject matter wherein the organic treating agent is one which also contains a metal atom in an inorganic or organic compound (e.g., trialkyl aluminum, etc.).

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520Synthetic Resins or Natural Rubbers,   the Glossary for the elements considered as being metals.
  
[List of Patents for class 525 subclass 196]    196Agent contains a metal atom:
 This subclass is indented under subclass 192.  Subject matter wherein the chemical treating agent contains a metal atom.
  
[List of Patents for class 525 subclass 197]    197Specified blending process:
 This subclass is indented under subclass 191.  Subject matter drawn to processes which involve specified blending operations associated with preparing the polymeric mixture.
(1) Note. The blending operation must be accompanied by some specific process limitations. Thus, if blending is accomplished by a simple "melt or fusion" blending then it is necessary to state a required temperature range. Similarly, if blending is accomplished by dissolving the polymers in one or more solvents, then it is necessary to specify at least the nature of the solvents, e.g., 2:1 solvent mixture of carbontetrachloride-benzene or 2:1 solvent mixture of halogenated hydrocarbon with aromatic hydrocarbon. In a multistep blending operation which includes heating, it is not necessary that the temperature be specified. Also, permissible are blending processes wherein heating is the only step but which do not disclosed specified temperatures when the polymers or polymer system are required to conform to certain parameters. For example, polymers A and B are heated above their glass transition temperatures (Tg) and then blended; or polymer A is heated to viscosity V1and polymer B is heated viscosity V2 and then blended. Terms such as ". . . blending and heating . . "or". . . mixing and vulcanizing . . ." are specific enough to be classified here. Some indication as to mixing at a given r.p.m. or vulcanizing at a given temperature would be adequate information.

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199,through 241, for a product which is the result of a specified blending process.
  
[List of Patents for class 525 subclass 198]    198With subsequent physical treatment:
 This subclass is indented under subclass 197.  Subject matter wherein the blending process is accompanied by a subsequent physical treatment; e.g., masticating (crushing), prilling (pelletizing), evaporation of solvent, shearing, rolling, pressing, milling, granulating, etc.
  
[List of Patents for class 525 subclass 199]    199Solid polymer derived from fluorine-containing ethylenic reactant:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an unsaturated fluorine-containing reactant, e.g., vinylidene fluoride, vinyl fluoride, etc.
  
[List of Patents for class 525 subclass 200]    200Fluorine reactant contains atoms other than C, H, or Hal:
 This subclass is indented under subclass 199.  Subject matter wherein the unsaturated fluorine-containing reactant contains elements other than carbon, hydrogen, or halogen, e.g., pentafluoroethyl acrylate, etc.
  
[List of Patents for class 525 subclass 201]    201Solid polymer derived from metal-containing ethylenic reactant:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from a metal-containing ethylenic reactant, e.g., sodium acrylate, etc.

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221,for a mixture containing a metal-containing polymer produced by the neutralization of polyacrylic acid with metal hydroxide.
  
[List of Patents for class 525 subclass 202]    202Solid polymer derived from reactant containing an acetylenic group:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from a reactant containing an acetylenic group, e.g., polyacetylene, sometimes called cuprene, etc.
  
[List of Patents for class 525 subclass 203]    203Solid polymer derived from ethylenic reactant containing a heterocyclic nitrogen:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing a nitrogen heterocycle (e.g., 2-vinyl pyridine, etc.).
  
[List of Patents for class 525 subclass 204]    204Heterocyclic reactant contains at least two hetero atoms in a single ring and at least one of which is nitrogen:
 This subclass is indented under subclass 203.  Subject matter wherein the nitrogen heterocycle contains two or more atoms in the same ring and wherein at least one of the hetero atoms is nitrogen.
(1) Note. The hetero ring may contain two or more nitrogen atoms or at least one nitrogen atom and at least one diverse hetero atom as oxygen, etc.
  
[List of Patents for class 525 subclass 205]    205Heterocyclic reactant is an imide or lactam:
 This subclass is indented under subclass 203.  Subject matter wherein the nitrogen heterocycle is an imide or a lactam, e.g., maleimide, N-vinyl pyrrolidone, etc.

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520Synthetic Resins and Natural Rubbers,   Glossary for a definition of the term "carboxylic acid or derivative" which defines "imide" and "lactam".
  
[List of Patents for class 525 subclass 206]    206Solid polymer derived from reactant containing a chalcogen atom (O, S, Se, Te) as part of a heterocyclic ring:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing a chalcogen (O, S, Se, Te) heterocycle (e.g., coumarone, furfuryl acrylate, etc.).
  
[List of Patents for class 525 subclass 207]    207Heterocyclic reactant contains anhydride group:
 This subclass is indented under subclass 206.  Subject matter wherein the chalcogen heterocycle contains an anhydride group (e.g., maleic anhydride, etc.).

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520Synthetic Resins and Natural Rubbers,   the Glossary, for a definition of the term "carboxylic acid or derivative" which defines "carboxylic acid anhydride".
  
[List of Patents for class 525 subclass 208]    208Heterocyclic reactant contains 1, 2-epoxy group:
 This subclass is indented under subclass 206.  Subject matter wherein the chalcogen heterocycle contains two carbon atoms and one chalcogen atom (e.g., glycidyl acrylate, allyl glycidyl ether, etc.).
  
[List of Patents for class 525 subclass 209]    209Solid polymer derived from reactant containing elements other than C, H, O, N, S, or Cl:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing elements other than carbon, hydrogen, nitrogen, oxygen, sulfur, or chlorine (e.g., bis(beta-chorethyl)-vinylphosphonate

Image 1 for class 525 subclass 209

  
[List of Patents for class 525 subclass 210]    210Solid polymer derived from reactant containing a fused- or bridged-ring system:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from a reactant containing a fused or bridged ring system (e.g., indene, pinene, etc.).

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fused or bridged ring system.
  
[List of Patents for class 525 subclass 211]    211Fused- or bridged-ring reactant contains at least two ethylenic groups:
 This subclass is indented under subclass 210.  Subject matter wherein a solid polymer is derived from a fused- or bridged-ring reactant which contains plural ethylenically unsaturated groups, e.g., dicyclopentadiene, etc.
  
[List of Patents for class 525 subclass 212]    212Solid polymer derived from sulfur-containing reactant:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing sulfur.
  
[List of Patents for class 525 subclass 213]    213Solid polymer derived from chlorine-containing reactant other than vinyl (idene) chloride:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from a reactant containing halogen other than vinyl vinylidene chloride (e.g., alphachloroacrylonitrile, etc.).

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239,for a mixture containing a solid polymer derived from vinyl or vinylidene chloride.
  
[List of Patents for class 525 subclass 214]    214Halogenated hydrocarbon other than vinyl- (idene) chloride:
 This subclass is indented under subclass 213.  Subject matter wherein the halogen-containing ethylenic reactant, which is other than vinyl or vinylidene chloride, is a halogenated hydrocarbon (e.g., 1,2-dichloroethylene, etc.).
  
[List of Patents for class 525 subclass 215]    215Halogenated hydrocarbon contains at least two ethylenic groups and is devoid of an aryl ring:
 This subclass is indented under subclass 214.  Subject matter wherein the halogenated hydrocarbon contains plural ethylenically unsaturated groups, and is free of any aromatic group (e.g., 2-chloroprene, etc.).
  
[List of Patents for class 525 subclass 216]    216Solid polymer derived from cycloaliphatic-containing reactant:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing a cycloaliphatic group (e.g., cyclopentene, etc.).
  
[List of Patents for class 525 subclass 217]    217Solid polymer derived from reactant containing nitrogen atom other than from (meth)acrylonitrile:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing nitrogen, other than as acrylonitrile or methacrylonitrile (e.g., 2-cyanoethyl-acrylate, etc.).

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238,for a solid polymer derived from acrylonitrile or methacrylonitrile.
  
[List of Patents for class 525 subclass 218]    218Nitrogen reactant contains a carboxylic acid amide group:
 This subclass is indented under subclass 217.  Subject matter wherein the nitrogen-containing ethylenic reactant contains a carboxylic acid amide group (e.g., acrylamide, etc.).
  
[List of Patents for class 525 subclass 219]    219Solid polymer derived from reactant containing a phenolic group:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing an aromatic hydroxyl or aromatic ether group.
  
[List of Patents for class 525 subclass 220]    220Solid polymer derived from reactant containing a carbonyl acid or derivative:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant which contains a carbonyl

Image 1 for class 525 subclass 220

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221,and 222+, for a mixture containing a solid polymer derived from a carboxylic acid or derivative.
  
[List of Patents for class 525 subclass 221]    221Solid polymer derived from reactant containing a carboxylic acid group:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant which contains a carboxylic acid group, e.g., acrylic acid, maleic acid, etc.

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520Synthetic Resins and Natural Rubbers,   Glossary for a definition of the term "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 222]    222Solid polymer derived from reactant containing a carboxylic acid ester group:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant which contains a carboxylic acid ester group (e.g., vinyl acetate, etc.).

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "carboxylic acid or derivative" which defines "carboxylic acid ester".
  
[List of Patents for class 525 subclass 223]    223Ester contains an oxygen atom other than as part of a carboxylic acid ester group:
 This subclass is indented under subclass 222.  Subject matter wherein the ester reactant contains an oxygen atom other than as part of a carboxylic acid ester group, e.g., 2-hydroxyethyl acrylate, etc.
  
[List of Patents for class 525 subclass 224]    224Ester derived from both an unsaturated carboxylic acid and an unsaturated alcohol:
 This subclass is indented under subclass 222.  Subject matter wherein the ester reactant is derived both from an unsaturated carboxylic acid and an unsaturated alcohol (e.g., dially fumarate, etc.).
  
[List of Patents for class 525 subclass 225]    225Ester contains at least two carboxylic acid ester groups:
 This subclass is indented under subclass 222.  Subject matter wherein the ester reactant contains at least two ester groups, e.g., dibutyl maleate, dimethyl itaconate, etc.
  
[List of Patents for class 525 subclass 226]    226Ester derived from polyol:
 This subclass is indented under subclass 225.  Subject matter wherein the reactant is derived from a polyol, e.g., ethylene glycol diacrylate, etc.
  
[List of Patents for class 525 subclass 227]    227Ester derived from an unsaturated carboxylic acid:
 This subclass is indented under subclass 222.  Subject matter wherein the reactant is derived from an unsaturated carboxylic acid (e.g., ethyl acrylate, n-propyl crotonate, etc.).
  
[List of Patents for class 525 subclass 228]    228At least two polymers derived from carboxylic acid ester reactants:
 This subclass is indented under subclass 227.  Subject matter wherein the polymeric mixture contains two or more solid polymers derived from carboxylic acid esters and at least one of said esters is derived from an unsaturated carboxylic acid (e.g., poly(butadiene-methyl acrylate) mixed with poly(methyl methacrylate), etc.).
  
[List of Patents for class 525 subclass 229]    229
 This subclass is indented under subclass 228.  Ester derived from an unsaturated alcohol: Subject matter wherein at least one of the solid polymers is derived from an ester reactant containing a moiety derived from an unsaturated alcohol; e.g., a mixture of poly(methyl methacrylate-vinyl acetate) and poly(butyl acrylate-vinyl acetate), etc.
  
[List of Patents for class 525 subclass 230]    230Polymer derived from nitrogen-containing reactant:
 This subclass is indented under subclass 227.  Subject matter wherein a solid polymer is derived from a nitrogen-containing reactant (e.g., acrylonitrile, etc.).
  
[List of Patents for class 525 subclass 231]    231Solid polymer derived from oxygen-containing reactant:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant containing oxygen (e.g., vinyl methyl ether, etc.).
  
[List of Patents for class 525 subclass 232]    232Solid polymer derived from reactant containing at least two ethylenic groups and is devoid of aryl ring:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an ethylenic reactant which contains at least two ethylenic groups and is free of an aromatic group (e.g., butadiene, isoprene, etc.).
  
[List of Patents for class 525 subclass 233]    233Polymer derived from nitrogen-containing reactant:
 This subclass is indented under subclass 232.  Subject matter wherein a solid polymer is derived from a nitrogen-containing ethylenic reactant 9e.g., acrylonitrile, etc.0.
  
[List of Patents for class 525 subclass 234]    234At least two polymers derived from nitrogen-containing reactants:
 This subclass is indented under subclass 233.  Subject mixture wherein the polymeric mixture contains at least two solid polymers derived from nitrogen-containing reactants (e.g., poly(butadiene-acrylonitrile) mixed with poly(vinylchloride-acrylonitrile), etc.).
  
[List of Patents for class 525 subclass 235]    235Polymer derived from halogen-containing reactant:
 This subclass is indented under subclass 232.  Subject matter wherein a solid polymer is derived from vinyl chloride or vinylidene chloride.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199+,and 213+, for a polymer derived from a halogen-containing reactant other than vinyl or vinylidene chloride.
  
[List of Patents for class 525 subclass 236]    236At least two polymers derived from reactants containing two or more ethylenic groups and devoid of an aryl ring:
 This subclass is indented under subclass 232.  Subject matter wherein the polymeric mixture contains two or more solid polymers derived from reactants which contain two or more ethylenic groups and no aromatic group.
  
[List of Patents for class 525 subclass 237]    237At least one of three polymers is derived from two or more reactants:
 This subclass is indented under subclass 236.  Subject matter wherein at least one solid polymer is derived from two or more reactants, e.g., poly(butadiene-styrene), etc.
  
[List of Patents for class 525 subclass 238]    238Solid polymer derived from (meth)acrylonitrile:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from (meth)acrylonitrile.
  
[List of Patents for class 525 subclass 239]    239Solid polymer derived from vinyl(idene) chloride:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from vinyl(idene) chloride.
  
[List of Patents for class 525 subclass 240]    240Solid polymer derived from ethylene or propylene:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from ethylene or propylene.
  
[List of Patents for class 525 subclass 241]    241Solid polymer derived from an aromatic hydrocarbon reactant:
 This subclass is indented under subclass 191.  Subject matter wherein the mixture contains a solid polymer derived from an aromatic hydrocarbon (e.g., styrene, etc.).
  
[List of Patents for class 525 subclass 242]    242Polymer derived from ethylenic reactants only mixed with ethylenic reactant:
 This subclass is indented under subclass 55.  Subject matter wherein a solid polymer derived from ethylenically unsaturated reactants only is mixed with an ethylenic reactant, processes of mixing, or the resultant product of any of the above mixture, e.g., graft copolymerization of poly(styrene-butadiene) with acrylonitrile or the block copolymerization of polystyrene with butadiene, etc.
(1) Note. This and indented subclasses contain as shown above graft and block copolymers whenever prepared according to the limitations set forth under this subclass. Thus, the process and product of preparing a mixture of graft poly(butadiene-styrene-polystyrene-acrylonitrile) with poly(styrene-acrylonitrile) starting with polybutadiene and styrene and acrylonitrile, is classified here.
(2) Note. This and indented subclasses also contain polymers prepared from a combination of ethylenic reactants mixed with nonethylenic reactants when reacted in the presence of ethylenically polymerized polymers, e.g., ethylene-ethylene oxide copolymer, propylene-sulfur dioxide copolymer. In the Class Definition of this class, see Lines With Other Classes and Within This Class, section II. B(2) for lines between this subclass and its indents.
(3) Note. This and indented subclasses also contain those products and compositions derived from the contacting of solid polymers from ethylenic reactants only with ethylenic materials wherein the ethylenic reactant interacts with the polymer without undergoing simultaneous or subsequent polymerization; (e.g., treating poly(2-hydroxethyl-acrylate) with acrylyl chloride or polyacrylic acid with allylamine, etc.).
(4) Note. Patents in the area are placed in the first subclass that provides for the solid polymer or ethylenic monomer. No distinction has been made as to amounts of required materials. Solid polymers from ethylenic reactants only are classified on the basis of the initial ethylenic reactants utilized in preparing same. No weight, for purposes of classification, has been given to polymers which have been post-treated chemically to introduce atoms therein or remove atoms which were part of the original polymer prior to introduction of the ethylenic monomer. See the Search Note below.
(5) Note. In those subclasses indented hereinbelow which recite "Block" in the title, the requirement for placement of a document therein is that the required ethylenic material as noted by the subclass title be in the block portion of the polymer and not in the graft portion of the molecule.
(6) Note. An ethylenic reactant requires the presence of two carbon atoms bonded together by a double or triple bond, with the proviso that the double bond is not part of an aromatic ring, or of a ring which shares a double bond with an aromatic ring. The term aromatic denotes a compound which contains a benzene nucleus whether or not it is condensed with other rings. Reactants such as furan, thiophene and pyrrole would thus meet the requirements for a ethylenically unsaturated compound.

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313,for the product obtained by halogenating polybutadiene and subsequently mixing same with vinyl chloride where said product is classified on the basis of butadiene.
  
[List of Patents for class 525 subclass 243]    243Reactions with ethylenic reactants in two or more diverse phases, e.g., bulk, emulsion, melt, solution, etc.:
 This subclass is indented under subclass 242.  Subject matter wherein one or more polymerization reactions occur in two or more distinct phases.
(1) Note. This subclass typically covers those manipulative processes involving multiphase preparation of modified polymers, notably graft copolymers, e.g., prepolymerizing by mass polymerization of polybutadiene dissolved in styrene and then dispersing the mixture in an aqueous solution containing a suspending agent and finally polymerizing the suspended prepolymer mixture until substantially all the reactant has been polymerized to afford the final product, etc.
  
[List of Patents for class 525 subclass 244]    244Contacting a solid polymer derived from ethylenic reactants only with an ethylenic reactant in the presence of a specified material:
 This subclass is indented under subclass 242.  Subject matter drawn to processes wherein a solid polymer derived from ethylenic reactants only is contacted with an ethylenic reactant and a specified material.

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520Synthetic Resins or Natural Rubbers,   the Glossary, or a definition of the term "specified material".
  
[List of Patents for class 525 subclass 245]    245Specified material contains transition metal atom:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a transition metal atom (i.e., the elements of atomic numbers 21-29, 39-47, 57-79, and 89 and higher and does not include Zn, Cd, and Hg).
(1) Note. The transition metal atom may be in elemental or compound form.
  
[List of Patents for class 525 subclass 246]    246In presence of water:
 This subclass is indented under subclass 245.  Subject matter wherein a transition metal atom, water, and an ethylenic reactant are simultaneously in contact with a solid polymer from ethylenic reactant only.
(1) Note. The amount of water present during the polymerization process is of no significance (e.g., diluent, catalyst, activator, etc.). The introduction of water may not be explicitly stated but only implied, e.g., the introduction of 37% formalin solution and 37% commercial hydrochloric acid. Nevertheless, these materials are generally recognized as containing water.
  
[List of Patents for class 525 subclass 247]    247Contains nontransition metal atom:
 This subclass is indented under subclass 245.  Subject matter wherein a transition metal atom is in contact with a nontransition metal atom at some time during the contacting process.
(1) Note. The term nontransition metal is intended to include all metals other than the transition metals.
(2) Note. The transition metals are the elements of atomic numbers 21-29, 39-47, 57-79, and 89 and higher; Zm, Ch, and Hg are not included.
(3) Note. The nontransition metalatom may be in the same compound as the transition metal atom or in a different compound, or it may exist in elemental form.
  
[List of Patents for class 525 subclass 248]    248Specified material contains a carbon or hydrogen atom bonded directly to a metal atom:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a metal-to-carbon or metal-to-hydrogen bond (e.g., NaH, CH3CH2Li, etc.).
  
[List of Patents for class 525 subclass 249]    249Metal atom is aluminum:
 This subclass is indented under subclass 248.  Subject matter wherein the metal associated with the metal-to-carbon or metal-to-hydrogen bond is aluminum (e.g., Al(C3H7)3, etc.).
  
[List of Patents for class 525 subclass 250]    250Metal atom is Group IA metal atom (Li, Na, K, Rb, Cs, Fr):
 This subclass is indented under subclass 248.  Subject matter wherein the metal associated with the metal-to-carbon or metal-to-hydrogen bond is a Group IA (L, Na, K, Rb, Cs, Fr) metal atom.
  
[List of Patents for class 525 subclass 251]    251
 This subclass is indented under subclass 244.  Specified material contains a boron atom: Subject matter wherein the specified material contains a boron atom (e.g., boron-trifluoride etherate complex, etc.).
  
[List of Patents for class 525 subclass 252]    252Specified material is a carbohydrate or is a solid synthetic polymer not intended to be in the final product:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material is a carbohydrate or is a solid synthetic polymer not intended to be in the final product.

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523Synthetic Resins or Natural Rubbers,   for polymer composition containing carbohydrates as a nonreacted material.
524Synthetic Resins or Natural Rubbers,   for polymer composition containing carbohydrates as a nonreacted material.
526Synthetic Resins or Natural Rubbers,   subclasses 200 through 203for polymerization processes utilizing carbohydrates and synthetic polymers not intended to be in the final product.
  
[List of Patents for class 525 subclass 253]    253Material contains a free alcohol group or is alcoholate thereof:
 This subclass is indented under subclass 252.  Subject matter wherein the specified solid synthetic polymer contains a free alcohol group or is an alcoholate salt thereof, e.g., polyvinyl alcohol, etc.
  
[List of Patents for class 525 subclass 254]    254Specified material contains silicon atom:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a silicon atom.
  
[List of Patents for class 525 subclass 255]    255Specified material contains a phosphorus atom:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a phosphorus atom.
  
[List of Patents for class 525 subclass 256]    256Specified material contains a heterocyclic ring:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a heterocyclic ring, e.g., ethylene oxide, etc.
  
[List of Patents for class 525 subclass 257]    257Specified material contains a ketone group:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a ketone group.

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523Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "ketone".
  
[List of Patents for class 525 subclass 258]    258Specified material contains an ether group:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains an ether group, e.g., polyethylene-glycol, etc.
  
[List of Patents for class 525 subclass 259]    259Specified material contains an organic nitrogen compound:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a nitrogen atom, which is part of an organic compound, e.g., dimethylacetamide, etc.
  
[List of Patents for class 525 subclass 260]    260Organic nitrogen compound contains an azo group, i.e., -N=N-:
 This subclass is indented under subclass 259.  Subject matter wherein the organic compound contains an azo group, i.e., -N=N-.
  
[List of Patents for class 525 subclass 261]    261Specified material contains an organic sulfur compound:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a sulfur atom as part of an organic compound (e.g., betamercapto propionic acid, etc.).
  
[List of Patents for class 525 subclass 262]    262Specified material contains a carboxylic acid or derivative:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a carboxylic acid or derivative thereof.
  
[List of Patents for class 525 subclass 263]    263Specified material contains a peroxy group, i.e., -O-O-:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material contains a peroxy group, i.e., -O-O-, e.g., di-tertiary butyl peroxide, etc.
  
[List of Patents for class 525 subclass 264]    264Contains nonperoxy compound or inorganic peroxy compound:
 This subclass is indented under subclass 263.  Subject matter wherein the specified material contains a nonperoxy compound (i.e., in addition to the peroxy compound) or is an inorganic peroxy compound.
  
[List of Patents for class 525 subclass 265]    265Aromatic or cycloaliphatic peroxy compound:
 This subclass is indented under subclass 263.  Subject matter wherein the peroxy group is part of an aromatic or cycloaliphatic compound (e.g., benzoyl peroxide, etc.).
  
[List of Patents for class 525 subclass 266]    266Specified material contains an organic chalcogen compound:
 This subclass is indented under subclass 244.  Subject matter wherein the specified material is an organic compound which contains a chalcogen atom (O, S, Se, Te).

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261,for a specified material containing a sulfur atom as part of an organic compound.
  
[List of Patents for class 525 subclass 267]    267Including step of preparing a polymer in the presence of a specified material and in the absence of a preformed polymer derived from ethylenic reactant only:
 This subclass is indented under subclass 242.  Subject matter drawn to processes which include the step of initially preparing a polymer in the presence of a specified material.
(1) Note. This subclass excludes the presence of a preformed polymer derived from ethylenic reactants only. In the Class Definition of this class, see Lines With Other Classes and Within This Class, section II. B(3) for lines between this subclass and its indents.
(2) Note. The specified material must present at some time prior to the completion of the in situ polymerization of the initial polymer and may remain during the final reaction with the ethylenic reactant.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the term "specified material".
  
[List of Patents for class 525 subclass 268]    268Specified material contains a transition metal atom:
 This subclass is indented under subclass 267.  Subject matter wherein the specified material contains a transition metal atom.

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245,for the definition of the term "transition metal".
  
[List of Patents for class 525 subclass 269]    269Transition metal is other than group IVB, VB, or VIB metal atom:
 This subclass is indented under subclass 268.  Subject matter wherein the transition metal atom is other than from Groups IVB, VB, or VIB.
(1) Note. Excluded from this subclass are elements Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.
  
[List of Patents for class 525 subclass 270]    270With nonmetal nonhydrocarbon compound:
 This subclass is indented under subclass 268.  Subject matter wherein, in addition to the transition metal, there is present a nonmetal, nonhydrocarbon compound, e.g., tetrakis (dialkyl amino) silane, etc.
  
[List of Patents for class 525 subclass 271]    271Specified material contains a group IA atom in elemental form, or bonded to hydrogen or carbon:
 This subclass is indented under subclass 267.  Subject matter wherein the specified material contains a Group IA metal in elemental form, or is bonded to hydrogen or carbon, e.g., NaH, CH3Li, etc.
  
[List of Patents for class 525 subclass 272]    272Contains an atom other than group IA, C, or H:
 This subclass is indented under subclass 271.  Subject matter wherein the specified material contains an element other than from Group IA, C, or H.
(1) Note. The word "contains" reads generically on the element whether found as an integral part of the specified material required for this subclass or in addition to the specified material.
(2) Note. Metal borohydrides, e.g., LiBH4 are classified as if they are hydrides of boron and of the metal atom.
(3) Note. Metal hydrides (e.g., NaAlH4) are classified as if they are mixed hydrides of aluminum and of the other metal.
  
[List of Patents for class 525 subclass 273]    273Specified material contains a compound containing a peroxy group, i.e., -O-O-:
 This subclass is indented under subclass 267.  Subject matter wherein the specified material contains a peroxy group, i.e., -O-O-.
  
[List of Patents for class 525 subclass 274]    274Ethylenic reactant contains a metal atom:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a metal atom.
  
[List of Patents for class 525 subclass 275]    275Ethylenic reactant contains an acetylenic group:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a carbon to carbon triple bond.
  
[List of Patents for class 525 subclass 276]    276Ethylenic reactant contains a fluorine atom:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains fluorine, e.g., tetrafluoroethylene, polyvinylidene fluoride, etc.
  
[List of Patents for class 525 subclass 277]    277Ethylenic reactant contains a carbonate group:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a carbonate

Image 1 for class 525 subclass 277

Image 2 for class 525 subclass 277

  
[List of Patents for class 525 subclass 278]    278Ethylenic reactant contains a carbamate group:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a carbamate group, wherein the carbamate group may be linear as in N-vinyl tert-butyl carbamate

Image 1 for class 525 subclass 278

  
[List of Patents for class 525 subclass 279]    279Ethylenic reactant contains nitrogen heterocycle:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a nitrogen heterocycle (e.g., 4-vinyl pyridine, etc.).
(1) Note. An ethylenically unsaturated nitrogen heterocyclic compound may contain a carbon-to-carbon double bond outside (exo) or inside (endo) the ring containing the nitrogen atom (s), e.g., N-vinylpyrrolidone, 1, 2-, 1, 3- and 1, 4-, diazine, pyridine, etc.

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242,for definitions of the terms "ethylenic reactant" and "aromatic".
  
[List of Patents for class 525 subclass 280]    280Block copolymer:
 This subclass is indented under subclass 279.  Subject matter wherein the solid polymer is a block copolymer derived from an ethylenic reactant containing a nitrogen heterocycle, e.g., (poly-2-methyl-3-vinylpyridine-poly-styrene) block copolymer, etc.
(1) Note. Grafted poly-2-vinyl-pyridine onto (poly-styrene-poly-butadiene) block copolymer is not proper for this subclass but in subclass 279 since the block portion is devoid of a nitrogen reactant.
  
[List of Patents for class 525 subclass 281]    281Nitrogen heterocycle contains at least two nitrogen atoms in the same ring:
 This subclass is indented under subclass 279.  Subject matter wherein the nitrogen heterocycle contains at least two nitrogen atoms in a single ring (e.g., triallyl cyanurate, etc.).
(1) Note. Compounds of the type, would also be classified here if it is disclosed to be a reactant.

Image 1 for class 525 subclass 281

  
[List of Patents for class 525 subclass 282]    282Imide:
 This subclass is indented under subclass 279.  Subject matter wherein the nitrogen heterocycle contains an imide group, e.g., maleimide, etc.

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520Synthetic Resins or Natural Rubbers,   for a definition of the "carboxylic acid or derivative" which defines "imide".
  
[List of Patents for class 525 subclass 283]    283Lactam:
 This subclass is indented under subclass 279.  Subject matter wherein nitrogen heterocycle contains a lactam group (e.g., N-vinyl pyrrolidone, etc.).

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520Synthetic Resins or Natural Rubbers,   for a definition of the term "carboxylic acid or derivative" which defines "lactam"
  
[List of Patents for class 525 subclass 284]    284Ethylenic reactant contains a chalcogen heterocycle:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a chalcogen heterocycle (chalcogen atom being O, S, Se, and Te).
  
[List of Patents for class 525 subclass 285]    285Cyclic anhydride:
 This subclass is indented under subclass 284.  Subject matter wherein the chalcogen heterocycle contains an anhydride group, e.g., maleic anhydride, etc.
  
[List of Patents for class 525 subclass 286]    286Three-membered ring containing two carbon and one chalcogen atom:
 This subclass is indented under subclass 284.  Subject matter wherein the chalcogen heterocycle consists of only two carbon atoms and one chalcogen atom (e.g., glycidyl methacrylate, etc.).
  
[List of Patents for class 525 subclass 287]    287Ethylenic reactant contains a phosphorus atom:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a phosphorus atom, e.g., bis (beta-chloroethyl) vinyl phosphonate (CH2=CH- P(O) (O CH 2CH2CL)2), etc.
  
[List of Patents for class 525 subclass 288]    288Ethylenic reactant contains atoms other than C, H, O, N, S, or CL:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains an element other than C, H, O, N, S, or chlorine.
  
[List of Patents for class 525 subclass 289]    289Ethylenic reactant contains a fused or bridged ring system:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a fused or bridged ring system (e.g., 5-ethylidene 2-norbornene, etc.).

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520Synthetic Resins or Natural Rubbers,   for a definition of the term "fused or bridged ring system".
  
[List of Patents for class 525 subclass 290]    290Dicyclopentadiene-containing group:
 This subclass is indented under subclass 289.  Subject matter wherein the fused-ring system contains the dicyclopentadiene moiety.
  
[List of Patents for class 525 subclass 291]    291Ethylenic reactant contains a sulfur atom:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains sulfur.
  
[List of Patents for class 525 subclass 292]    292Ethylenic reactant contains a chlorine atom and is other than vinyl(idene) chloride:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains chlorine and is other than vinyl(idene) chloride, e.g., chloroprene, etc.

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317+,for solid polymer derived from vinyl or vinylidene chloride.
  
[List of Patents for class 525 subclass 293]    293Ethylenic material contains a nitrogen atom and is other than (meth)acrylonitrile:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic material contains a nitrogen atom and is other than meth(acrylonitrile), e.g., dimethylaminoethyl acrylate, etc.

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242,for a solid polymer derived from methacrylonitrile or acrylonitrile.
  
[List of Patents for class 525 subclass 294]    294Block copolymer derived from nitrogen-containing reactant:
 This subclass is indented under subclass 293.  Subject matter wherein the polymer is a block copolymer derived from a nitrogen-containing reactant.
(1) Note. This subclass does not provide for the grafting of a nitrogen-containing reactant onto a nonnitrogen containing block copolymer.
  
[List of Patents for class 525 subclass 295]    295Nitrogen atom is part of a nitrile group and is other than acrylonitrile or (meth)acrylonitrile:
 This subclass is indented under subclass 293.  Subject matter wherein the nitrogen atom is part of a nitrile group and is other than (meth)acrylonitrile (e.g., vinylidene cyanide, etc.).

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242,for a solid polymer derived from methacrylonitrile or acrylonitrile.
  
[List of Patents for class 525 subclass 296]    296Nitrogen atom is part of an amide group:
 This subclass is indented under subclass 293.  Subject matter wherein a nitrogen atom is part of a carboxylic acid amide group, e.g., acrylamide, etc.

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520Synthetic Resins or Natural Rubbers,   for a definition of the term "carboxylic acid amide" under "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 297]    297Ethylenic reactant contains a cycloaliphatic group:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains a cyclialophatic group, e.g., cyclopentene, etc.
  
[List of Patents for class 525 subclass 298]    298Ethylenic reactant contains an oxygen atom:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains an oxygen atom (e.g., acrolein, etc.).
  
[List of Patents for class 525 subclass 299]    299Block copolymer derived from oxygen-containing reactant:
 This subclass is indented under subclass 298.  Subject matter wherein the polymer is a block copolymer derived from an ethylenic reactant containing an oxygen atom.
(1) Note. The product obtained by block copolymerizing methyl vinyl ketone-polystyrene is classified here. To be proper for this subclass, the block copolymer must be derived from an unsaturated oxygen-containing reactant.

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300,for the product obtained by grafting polymethyl vinyl ketone (via methyl vinyl ketone as reactant) onto styrene-butadiene block copolymer.
  
[List of Patents for class 525 subclass 300]    300Oxygen atom is part of a ketone or ketene group:
 This subclass is indented under subclass 298.  Subject matter wherein the oxygen atom is part of a ketone or ketene group, e.g., methyl vinyl ketone, etc.
(1) Note. Ketene readily forms a dimer known as diketene. Chemical studies indicate that diketene is composed mainly of vinylaceto-B-lactone (I) and B-crotonalactone (II).

Image 1 for class 525 subclass 300

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284,for use of ketene dimer as a reactant.
  
[List of Patents for class 525 subclass 301]    301Oxygen atom is part of a carboxylic acid group:
 This subclass is indented under subclass 298.  Subject matter wherein the oxygen atom is part of a carboxylic acid group (e.g., acrylic acid, etc.).
  
[List of Patents for class 525 subclass 301.5]    301.5Unsaturated fatty acid derived from a naturally occurring glyceride, tall oil, or an unsaturated fatty acid derived from tall oil:
 This subclass is indented under subclass 301.  Subject matter wherein the carboxylic acid group containing ethylenic reactant is an unsaturated aliphatic acyclic monocarboxylic acid derived from a naturally occurring fatty glyceride or is derived from tall oil or is tall oil, per se.

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302+,for a fatty acid glycerol ester.
305,for systems wherein the ester containing at least two carboxylic acid groups is a naturally occurring di- or tri-glyceride, e.g., linseed oil, castor oil, etc.

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520Synthetic Resins or Natural Rubbers,   for a definition of the term "fatty acid" and the other materials proper for this subclass.
  
[List of Patents for class 525 subclass 302]    302Oxygen atom is part of a carboxylic acid ester group:
 This subclass is indented under subclass 298.  Subject matter wherein the oxygen atom is part of a carboxylic acid ester group, e.g., vinyl benzoate, etc.
  
[List of Patents for class 525 subclass 303]    303Ester contains an oxygen atom other than as a carboxylic acid ester group:
 This subclass is indented under subclass 302.  Subject matter wherein the carboxylic acid ester contains a noncarboxylic acid ester type oxygen atom (e.g., 2-hydroxyethyl acrylate diethyleneglycol di-acrylate (O(CH2- OCOCH=CH2)2), etc.).
  
[List of Patents for class 525 subclass 304]    304Ester contains at least two carboxylic acid ester groups:
 This subclass is indented under subclass 302.  Subject matter wherein the carboxylic acid ester contains at least two carboxylic acid ester groups (e.g., dimethyl maleate, etc.).
  
[List of Patents for class 525 subclass 305]    305Ester is derived from a polyol:
 This subclass is indented under subclass 304.  Subject matter wherein the carboxylic acid ester is derived from a polyol, e.g., ethylene glycol diacrylate, etc.
  
[List of Patents for class 525 subclass 306]    306Ester is derived from an unsaturated alcohol:
 This subclass is indented under subclass 304.  Subject matter wherein the carboxylic acid ester is derived from an unsaturated alcohol (e.g., diallyl maleate, diallyl succinate, etc.).
  
[List of Patents for class 525 subclass 307]    307Ester is derived from an unsaturated carboxylic acid and an unsaturated alcohol:
 This subclass is indented under subclass 302.  Subject matter wherein the carboxylic acid ester is derived from an unsaturated carboxylic acid and an unsaturated alcohol (e.g., allyl methacrylate, etc.).
  
[List of Patents for class 525 subclass 308]    308Ester is derived from an unsaturated carboxylic acid:
 This subclass is indented under subclass 302.  Subject matter wherein the carboxylic acid ester is derived from an unsaturated carboxylic acid (e.g., methyl methacrylate, etc.).
  
[List of Patents for class 525 subclass 309]    309Ester derived from an unsaturated carboxylic acid is reacted in the presence of a solid polymer:
 This subclass is indented under subclass 308.  Subject matter wherein the unsaturated ester is reacted in the presence of a solid polymer.
(1) Note. The ester may also be present in the solid polymer, but it must be present either as an unpolymerized reactant or as a liquid polymer, e.g., poly(styrene-methyl methacrylate) is treated with either butyl acrylate or liquid poly(methyl acrylate), etc.
  
[List of Patents for class 525 subclass 310]    310Ester reactant derived from an unsaturated carboxylic acid is reacted in the presence of a solid polymer substrate derived from a polyene hydrocarbon:
 This subclass is indented under subclass 309.  Subject matter wherein the solid polymer is derived from a plural unsaturated hydrocarbon reactant (e.g., grafting methyl acrylate onto solid poly(butadiene-styrene).
  
[List of Patents for class 525 subclass 311]    311Ester reactant derived from an unsaturated alcohol is reacted in the presence of a solid polymer:
 This subclass is indented under subclass 302.  Subject matter wherein a carboxylic acid ester reactant derived from an unsaturated alcohol is reacted in the presence of a solid polymer (e.g., contacting poly(acrylonitrile-styrene) with vinyl acetate, etc.).
  
[List of Patents for class 525 subclass 312]    312Oxygen atom is part of an ether group:
 This subclass is indented under subclass 298.  Subject matter wherein the oxygen atom is part of an ether group (e.g., divinyl ether, etc.).
  
[List of Patents for class 525 subclass 313]    313Ethylenic reactant contains at least two unsaturated groups and is devoid of an aromatic group:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant contains at least two unsaturated groups and is free of an aromatic group (e.g., mixing polyvinylchloride with butadiene, etc.).
  
[List of Patents for class 525 subclass 314]    314Block copolymer derived from reactant containing at least two unsaturated groups and is free of an aromatic group:
 This subclass is indented under subclass 313.  Subject matter wherein the polymer is a block copolymer derived from an ethylenic reactant containing at least two ethylenic groups which ethylenic reactant is free of an aromatic group, e.g., block copolymer of (polybutadiene-polypropylene).
(1) Note. To be proper for this subclass the block copolymer itself must be derived from a necessary reactant for this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

313+,for a block copolymer derived from styrene and acrylonitrile with a nonaromatic plural unsaturated reactant.
  
[List of Patents for class 525 subclass 315]    315Ethylenic reactant reacted in the presence of a solid polymer substrate derived from reactant containing two unsaturated groups and is devoid of an aromatic group:
 This subclass is indented under subclass 313.  Subject matter wherein the initial solid polymer derived from a reactant containing at least two ethylenic groups and is free of an aromatic group and which solid polymer is reacted with an ethylenic reactant.
  
[List of Patents for class 525 subclass 316]    316Ethylenic reactant is an aromatic hydrocarbon:
 This subclass is indented under subclass 315.  Subject matter wherein the ethylenic reactants reacted with the solid polymer is an aromatic reactant, e.g., poly(butadiene-styrene) reacted with styrene, etc.
  
[List of Patents for class 525 subclass 317]    317Ethylenic reactant is vinyl(idene) chloride:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant is vinyl chloride or vinylidene chloride.
  
[List of Patents for class 525 subclass 318]    318Block copolymer derived from vinyl(idene) chloride:
 This subclass is indented under subclass 317.  Subject matter wherein the polymer is a block copolymer derived from vinyl chloride or vinylidene chloride.
(1) Note. To be proper for this subclass, the intiial block copolymer must be derived from vinyl or vinylidene chloride.
  
[List of Patents for class 525 subclass 319]    319Ethylenic reactant is acyclic hydrocarbon:
 This subclass is indented under subclass 242.  Subject matter wherein the ethylenic reactant is an acyclic hydrocarbon.
  
[List of Patents for class 525 subclass 320]    320Acyclic hydrocarbon contains five or more carbon atoms:
 This subclass is indented under subclass 319.  Subject matter wherein the acyclic hydrocarbon contains at least five carbon atoms (e.g., 4-methyl-hexene-1, etc.).
  
[List of Patents for class 525 subclass 321]    321Block copolymer derived from acyclic hydrocarbon containing five or more carbon atoms:
 This subclass is indented under subclass 320.  Subject matter wherein the polymer is a block copolymer derived from an unsaturated acyclic reactant having at least five carbon atoms.
(1) Note. To be proper for this subclass, the initial block copolymer must be derived from an acyclic hydrocarbon containing five or more carbon atoms.
  
[List of Patents for class 525 subclass 322]    322Acyclic hydrocarbon is propylene:
 This subclass is indented under subclass 319.  Subject matter wherein the acyclic hydrocarbon is propylene.
  
[List of Patents for class 525 subclass 323]    323Block copolymer derived from propylene:
 This subclass is indented under subclass 322.  Subject matter wherein the polymer is a block copolymer derived from propylene.
(1) Note. To be proper for this subclass, the initial block copolymer must be derived from propylene.
  
[List of Patents for class 525 subclass 324]    324Acyclic hydrocarbon is ethylene:
 This subclass is indented under subclass 319.  Subject matter wherein the acyclic reactant is ethylene.
  
[List of Patents for class 525 subclass 326.1]    326.1Chemically after treated solid polymers derived from ethylenically unsaturated monomers only:
 This subclass is indented under subclass 55.  Product wherein a solid polymer solely derived from ethylenically unsaturated monomers has been chemically modified by a treatment in the presence of a chemical treating agent.
(1) Note. See Lines With Other Classes and Within This Class, section II. B(4)(a) through II. B(4)(e) of the Class Definition for a discussion of classifying patents into this subclass and its indents vis-a-via other areas.
(2) Note. A material is presumed to be a rubber if it is described as an elastomer or if Mooney viscosity is given.

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337,through 388, for vulcanizable or cross-linkable compositions

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "chemical treating agent".
526Synthetic Resins or Natural Rubbers,   subclasses 78+ for process of adding material to the zone of an ongoing polymerization of ethylenically unsaturated monomers. Such added materials are often identified as chain stoppers, chain terminators or chain transfer agents.
  
[List of Patents for class 525 subclass 326.2]    326.2Polymer derived from fluorine monomer:
 This subclass is indented under subclass 326.1.  Products wherein a solid polymer derived from a fluorine containing ethylenic unsaturated monomer has been chemically modified.
  
[List of Patents for class 525 subclass 326.3]    326.3Vulcanized or crosslinked in presence of chemical treating agent:
 This subclass is indented under subclass 326.2.  Products wherein a chemical modification is described as vulcanization or cross-linking using a chemical treating agent.
(1) Note. The terms curing or hardening are presumed to be synonymous with vulcanizing or cross-linking in the absence of disclosure to the contrary. For the instant subclass, any other language will be sufficient which shows that the chemical modification changes the system from thermoplastic (or soluble) to thermosetting (or insoluble). The term chain-extending is presumed not to express cross-linking in the absence of disclosure to the contrary.
(2) Note. Vulcanizable compositions are not subject matter for this subclass unless prior to the vulcanization or cross-linking step there is present a chemically modified solid polymer derived from ethylenic monomers only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337,through 388, for vulcanizable or cross-linkable compositions.
  
[List of Patents for class 525 subclass 326.4]    326.4Halogen containing chemical treating agent; or dehalogenated:
 This subclass is indented under subclass 326.2.  Product wherein a halogen containing treating agent is employed; or wherein a chemical treating agent is present during a step of removal of halogen.
  
[List of Patents for class 525 subclass 326.5]    326.5Polymer derived from silicon monomer:
 This subclass is indented under subclass 326.1.  Product wherein a solid polymer derived from a silicon containing ethylenic unsaturated monomer has been chemically modified.
  
[List of Patents for class 525 subclass 326.6]    326.6Polymer derived from monomer containing atom other than: C, H, N, O, S, halogen or group IA or IIA carboxylate:
 This subclass is indented under subclass 326.1.  Product wherein the solid polymer which has been chemically modified is derived from a monomer which contains an atom other than C, H, N, O, S, halogen, or carboxylates of groups IA or IIA metals.
(1) Note. Included herein are for example monomers which contain phosporus, etc.

SEE OR SEARCH CLASS:

525Synthetic Resins or Natural Rubbers,   subclass 366 for the definition of Group IA and IIA metals.
  
[List of Patents for class 525 subclass 326.7]    326.7Polymer derived from monomer containing nitrogen atom as part of a heterocyclic ring:
 This subclass is indented under subclass 326.1.  Product wherein a solid polymer which has been chemically modified is derived from a monomer which contains a nitrogen atom as part of a heterocyclic ring.
  
[List of Patents for class 525 subclass 326.8]    326.8Oxygen atom in ring or bonded directly to the nuclear carbon of ring monomer:
 This subclass is indented under subclass 326.7.  Product wherein the heterocyclic monomer contains (1) an oxygen atom in the hetero ring, or (2) an oxygen atom directly attached to a nuclear carbon atom of the hetero ring.
  
[List of Patents for class 525 subclass 326.9]    326.9Lactam monomer, e.g., vinyl pyrrolidone, etc:
 This subclass is indented under subclass 326.8.  Product wherein the heterocyclic monomer is a lactam.

SEE OR SEARCH CLASS:

520Synthetic Resind or Natural Rubbers,   Glossary, for the definition of the term "carboxylic acid or derivative" which defines "lactam".
  
[List of Patents for class 525 subclass 327.1]    327.16 membered ring containing 5 carbons and 1 nitrogen monomer, e.g., vinyl pyridine, etc.
 This subclass is indented under subclass 326.7.  Product wherein the heterocyclic monomer contains a 6 membered ring having 5 carbons and 1 nitrogen atom.
  
[List of Patents for class 525 subclass 327.2]    327.2Polymer derived from monomer containing chalcogen as part of heterocyclic ring other than soley as cyclic anhydride of ethlenically unsaturated dicarboxylic acid:
 This subclass is indented under subclass 326.1.  Product wherein a solid polymer which has been chemically modified is derived from a monomer which contains chalcogen as part of a heterocyclic ring and other than solely as a cyclic anhydride of an ethylenically unsaturated dicarboxylic acid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

327.4,for chemically modified solid polymers derived from cyclic anhydrides of ethylenic dicarboxylic acids.
  
[List of Patents for class 525 subclass 327.3]    327.3Three membered chalcogen ring monomer, e.g., oxirane, etc.
 This subclass is indented under subclass 327.2.  Product wherein the heterocyclic monomer contains a three membered ring having two carbons and one chalcogen atom.
(1) Note. Included herein is e.g., glycidyl acrylate, etc.
  
[List of Patents for class 525 subclass 327.4]    327.4Polymer derived from carboxylic acid anhydride monomer:
 This subclass is indented under subclass 326.1.  Product wherein a solid polymer which has been chemically modified is derived from a monomer which has a carboxylic acid anhydride group.

SEE OR SEARCH CLASS:

520Synthetic Resind or Natural Rubbers,   Glossary, for the definition of the term "carboxylic acid anhydride" under "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 327.5]    327.5Sulfur containing chemical treating agent:
 This subclass is indented under subclass 327.4.  Product wherein a sulfur containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 327.6]    327.6Nitrogen containing chemical treating agent other than unsubstituted ammonium as sole nitrogen:
 This subclass is indented under subclass 327.4.  Product wherein a nitrogen containing chemical treating agent other than an unsubstituted ammonium compound has been employed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

327.8,for use of unsubstituted ammonium compound as a hydrolyzing or neutralizing agent.
  
[List of Patents for class 525 subclass 327.7]    327.7Esterified, i.e., preparation of COOR linkage:
 This subclass is indented under subclass 327.4.  Product wherein a chemical modification of the solid polymer is described as esterification.
(1) Note. For purposes of this subclass, esterification denotes formation of a

Image 1 for class 525 subclass 327.7

(2) Note. Reaction of carboxylic anhydride group with an alkylene oxide group is presumed to be esterification.
  
[List of Patents for class 525 subclass 327.8]    327.8Hydrolyzed; neutralized; or metal containing chemical treating agent:
 This subclass is indented under subclass 327.4.  Product wherein a chemical modification of the solid polymer is described as hydrolysis or neutralization; or wherein a metal containing chemical treating agent has been employed.
(1) Note. For purposes of this subclass, hydrolysis relates to addition of water to open the anhydride structure with formation of two carboxyl groups. In the absence of disclosure otherwise, treatment of anhydride with an aqueous system is presumed to result in a hydrolysis of the anhydride structure.
(2) Note. For purposes of this subclass, neutralization relates to the reaction of an acid group, e.g., carboxyl, phosphonic, etc., with a base to form a salt. The bases include alkali, alkaline earth, or ammonium hydroxides.
(3) Note. The metal containing chemical treating agent need only be present during a chemical modification step; included in this subclass, however, are systems wherein a metal atom becomes chemically bonded to the solid polymer. The chemical bond can be ionic or covalent in nature, or any of the "complex" bonding mechanisms as in (ii) pi bonding, coordination, etc.
  
[List of Patents for class 525 subclass 327.9]    327.9Polymer for unsaturated petroleum hydrocarbon fraction as monomer:
 This subclass is indented under subclass 326.1.  Product wherein a solid polymer which has been chemically modified is prepared by the polymerization of a mixture of hydrocarbons derived from a petroleum hydrocarbon fraction.
(1) Note. This subclass includes chemically modified polymers wherein added material is interpolymerized with a petroleum hydrocarbon fraction.

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327.2,for chemically modified interpolymer of coumarone and indene.
332.1,for a chemically modified polymer derived from a diene monomer wherein at least one monomer contains a fused or bridged ring or at least one cycloaliphatic structure.

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526Synthetic Resins or Natural Rubbers,   subclass 290 for the polymerization of a mixture of hydrocarbons derived from a petroleum hydrocarbon fraction.
  
[List of Patents for class 525 subclass 328.1]    328.1Polymer derived from acetylenic monomer:
 This subclass is indented under subclass 326.1.  Product wherein a solid polymer which has been chemically modified is derived from an acetylenic monomer.
  
[List of Patents for class 525 subclass 328.2]    328.2Polymer derived from monomer containing nitrogen other than: unsubstituted ammonium, acrylonitrile, acrylamide, methylolacrylamide, and the corresponding methacryl materials:
 This subclass is indented under subclass 326.1.  Product wherein the solid polymer which has been chemically modified is derived from a nitrogen containing monomer other than: NH4+ as sole nitrogen, acrylonitrile, acrylamide, methylol acrylamide, methacrylonitrile, mathacrylamide and methylol methacrylamide.

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328.8,for methylol acrylamide or methylol methacrylamide polymers.
329.1+,for acrylonitrile or methacrylonitrile polymers.
329.4+,for acrylamide or methacrylamide polymers.
329.5+,and 329.9+, for polymers derived from NH4+ containing salt monomers.
  
[List of Patents for class 525 subclass 328.3]    328.3At least one monomer containing two or more ethylenic groups:
 This subclass is indented under subclass 328.2.  Product wherein at least one monomer contains two or more ethylenic groups.
  
[List of Patents for class 525 subclass 328.4]    328.4Monomer containing two or more nitrogen atoms, or two or more nitrogen containing monomers:
 This subclass is indented under subclass 328.2.  Product wherein a monomer contains two or more nitrogen atoms; or wherein there are two or more nitrogen containing monomers.
(1) Note. The additional nitrogen containing monomer can be any ethylenic monomer which contains nitrogen, including those excluded from subclass 328.2.
  
[List of Patents for class 525 subclass 328.5]    328.5Polymer derived from sulfur monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from a sulfur containing thylenic monomer.
  
[List of Patents for class 525 subclass 328.6]    328.6Polymer derived from ketone monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from an ethylenically unsaturated ketone.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "ketone".
  
[List of Patents for class 525 subclass 328.7]    328.7Polymer derived from aldehyde monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived an ethylenic monomer which is an aldehyde.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "aldehyde".
  
[List of Patents for class 525 subclass 328.8]    328.8Polymer derived from alcohol monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from an ethylenically unsaturated monomer which contains an alcohol group.
(1) Note. For purposes of this subclass, an alcohol group is defined as -C- OH where the C is not directly double bonded to another chalcogen atom. Included herein are for example allyl alcohol or vinyl salicylate.
  
[List of Patents for class 525 subclass 328.9]    328.9Polymer derived from ether monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from an ethylenically unsaturated ether monomer.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "ether".
  
[List of Patents for class 525 subclass 329.1]    329.1Polymer derived from acrylonitrile or methacrylonitrile monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from acrylonitrile or methacrylonitrile monomer.
  
[List of Patents for class 525 subclass 329.2]    329.2Interpolymers:
 This subclass is indented under subclass 329.1.  Product wherein the solid polymer is derived from an additional ethylenic monomer interpolymerized with the acrylonitrile or methacrylonitrile.
  
[List of Patents for class 525 subclass 329.3]    329.3Contains monomer having two or more ethylenic groups:
 This subclass is indented under subclass 329.2.  Product wherein the solid interpolymer has been derived from at least one monomer containing two or more ethylenic groups.
  
[List of Patents for class 525 subclass 329.4]    329.4Polymer derived from acrylamide or methacrylamide monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from acrylamide or methacrylamide monomer.
  
[List of Patents for class 525 subclass 329.5]    329.5Polymer derived from carboxylic acid or derivative monomer other than: vinyl acetate; or acrylic-or methacrylic-acid, or derivatives:
 This subclass is indented under subclass 326.1.  Product wherein the solid polymer, which has been chemically modified, is obtained from an ethylenic monomer which is a carboxylic acid or derivative other than: vinyl acetate; or acrylic or methacrylic acid or derivatives.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329.7+,and 330.3+, for chemically modified solid polymers based upon derivatives of acrylic or methacrylic acid, e.g., acrylyl chloride or ethyl acrylate, etc. and subclasses 330.3+ for polymers derived from vinyl acetate.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the term "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 329.6]    329.6Butene dioic acid or derivative monomer:
 This subclass is indented under subclass 329.5.  Product wherein the carboxylic acid monomer is a butene dioic acid or derivative.
(1) Note. For purposes of this subclass, butene dioic acid is defined as a dicarboxylic acid having only four carbon atoms and one ethylenic unsaturation.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of the terms "carboxylic acid or derivative" and "ethylenically unsaturated".
  
[List of Patents for class 525 subclass 329.7]    329.7Polymer derived from acrylic or methacrylic acids, acid halides or salt monomers:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from acrylic or methacrylic acids, acrylic or methacrylic acid halide or salt monomers thereof.
  
[List of Patents for class 525 subclass 329.8]    329.8Sulfur or phosphorous containing chemical treating agent:
 This subclass is indented under subclass 329.7.  Product wherein a sulfur or phosphorous containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 329.9]    329.9Nitrogen containing chemical treating agent:
 This subclass is indented under subclass 329.7.  Product wherein a nitrogen containing chemical treating agent is employed.
  
[List of Patents for class 525 subclass 330.1]    330.1Esterified, i.e., preparation of COOR linkage:
 This subclass is indented under subclass 329.7.  Product wherein a chemical modification of the solid polymer is described as esterification.
(1) Note. For purposes of this subclass, esterification denotes formation of a

Image 1 for class 525 subclass 330.1

(2) Note. Reaction of carboxylic acid group with an alkylene oxide group is presumed to be esterification.
(3) Note. Included herein is formation of e.g., lactone structures, etc.
  
[List of Patents for class 525 subclass 330.2]    330.2Hydrolyzed; neutralized; or metal containing chemical treating agent:
 This subclass is indented under subclass 329.7.  Product wherein a chemical modification of the solid polymer is described as hydrolysis or neutralization; or wherein a metal con+taining chemical treating agent has been employed.
(1) Note. For purposes of this subclass, hydrolysis relates to the addition of water to a carboxylic acid chloride or carboxylic acid ester to form a free carboxyl group.
Chemical treatment of acid chloride containing polymer with an aqueous system is presumed to be hydrolysis in absence of disclosure otherwise.
Chemical treatment of ester containing polymer with aqueous acid or base is presumed to be hydrolysis in absence of disclosure otherwise.
(2) Note. For purposes of this subclass, neutralization relates to reaction of an acid group (e.g., carboxyl, etc.) with a base to form a salt. The bases include alkali or alkaline earth hydroxides.
(3) Note. The metal containing chemical treating agent need only be present during a chemical modification step; included in this subclass however, are systems wherein a metal atom becomes chemically bonded to the solid polymer. The chemical bond can be ionic or covalent in nature, or any of the "complex" bonding mechanisms as in ii (PI) bonding, coordination, etc.
  
[List of Patents for class 525 subclass 330.3]    330.3Polymer derived from acrylic or methacylic ester or vinyl acetate monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer is derived from ethylenically unsaturated carboxylic ester monomer (i.e., vinyl acetate; or acrylic or methacrylic esters).
  
[List of Patents for class 525 subclass 330.4]    330.4Sulfur or phosphorus containing chemical treating agent:
 This subclass is indented under subclass 330.3.  Product wherein a sulfur or phosphorus containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 330.5]    330.5Nitrogen containing chemical treating agent:
 This subclass is indented under subclass 330.3.  Product wherein a nitrogen containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 330.6]    330.6Alcoholized; transesterified; hydrolyzed; or metal containing chemical treating agent; e.g., saponified, etc.:
 This subclass is indented under subclass 330.3.  Product wherein a chemical modification of the solid polymer is described as alcoholysis, transesterification, or hydrolysis; or wherein a metal containing chemical treating agent has been employed.
(1) Note. For purposes of this subclass, alcohoysis relates to the reaction of an alcohol with a carboxylic acid ester to yield a new ester and alcohol.
(2) Note. For purposes of this subclass transesterification or ester interchange relates to reaction of two esters to form two new esters by exchange of alcohol residues.
(3) Note. For purposes of this subclass, hydrolysis relates to addition of water to an ester to form an alcohol and a carboxylic acid. This reaction can be either acid or base catalysed.
(4) Note. Alkaline hydrolysis of an ester is called saponification.
  
[List of Patents for class 525 subclass 330.7]    330.7Polymer derived from halogen monomer:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer has been derived from halogen containing ethylenically unsaturated monomer.
  
[List of Patents for class 525 subclass 330.8]    330.8At least one monomer contains two or more ethylenic groups:
 This subclass is indented under subclass 330.7.  Product wherein at least one monomer contains two or more ethylenic groups.
(1) Note. The monomer containing two or more double bonds need not contain halogen.
  
[List of Patents for class 525 subclass 330.9]    330.9Vulcanized or crosslinked, in the presence of a chemical treating agent, e.g., cured, etc.:
 This subclass is indented under subclass 330.8.  Products wherein a chemical modification is described as vulcanization or cross-linking using a chemical treating agent.
(1) Note. The terms curing or hardening are presumed to be synonymous with vulcanizing or cross-linking in the absence of disclosure to the contrary. For the instant subclass, any other language will be sufficient which shows that the chemical modification changes the system from thermoplastic (or soluble) to thermosetting (or insoluble). The term chain-extending is presumed not to express cross-linking in the absence of disclosure to the contrary.
(2) Note. Vulcanizable compositions are not subject matter for this subclass unless prior to the vulcanization or cross-linking step there is present a chemically modified solid polymer derived from ethylenic monomers only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

337,through 388, for vulcanizable or cross-linkable compositions.
  
[List of Patents for class 525 subclass 331.1]    331.1Nitrogen containing chemical treating agent:
 This subclass is indented under subclass 330.9.  Product wherein a nitrogen containing material is present as chemical treating agent.
  
[List of Patents for class 525 subclass 331.2]    331.2Halogen containing chemical treating agent:
 This subclass is indented under subclass 330.8.  Product wherein a halogen containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 331.3]    331.3Nitrogen containing chemical treating agent:
 This subclass is indented under subclass 330.8.  Product wherein a nitrogen containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 331.4]    331.4Monomer contains chlorine:
 This subclass is indented under subclass 330.7.  Product wherein at least one ethylenically unsaturated monomer contains chlorine.
  
[List of Patents for class 525 subclass 331.5]    331.5Vinyl chloride or vinylidene chloride:
 This subclass is indented under subclass 331.4.  Product wherein the chlorine containing monomer is vinyl chloride or vinylidene chloride.
  
[List of Patents for class 525 subclass 331.6]    331.6Halogen containing chemical treating agent:
 This subclass is indented under subclass 331.5.  Product wherein a halogen containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 331.7]    331.7Ethylene-propylene terpolymer, e.g., EPT, EPDM, EPR, etc.:
 This subclass is indented under subclass 326.1.  Product wherein the solid polymer which has been chemically modified is an ethylene-propylene terpolymer.
(1) Note. An ethylene-propylene terpolymer has at least one monomer in addition to ethylene and propylene.
(2) Note. Ethylene-propylene terpolymers are often described as ethylene-propylene terpolymer rubber (e.g., EPT OR EPDM rubber).
(3) Note. Chemically modified material solely described as ethylene-propylene rubber (EPR) is placed herein as a terpolymer since a rubber is to be treated as a diene polymer in the absence of disclosure to the contrary

SEE OR SEARCH THIS CLASS, SUBCLASS:

333.1,for material solely described as a rubber or elastomer and presumed to be a diene rubber.
333.7,for chemically modified copolymer of ethylene with propylene.
  
[List of Patents for class 525 subclass 331.8]    331.8Sulfur containing chemical treating agent:
 This subclass is indented under subclass 331.7.  Product wherein a sulfur containing chemical treating agent is employed.
  
[List of Patents for class 525 subclass 331.9]    331.9Polymer derived from monomer containing at least two ethylenic groups or diene rubber:
 This subclass is indented under subclass 326.1.  Product wherein the solid polymer, which has been chemically modified, is either described as a diene rubber or is derived from a monomer which contains at least two ethylenic groups.
(1) Note. A material is presumed to be a rubber if it is described as an elastomer or if a Mooney viscosity is given.

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333.1,for material solely described as a rubber or elastomer and presumed to be a diene rubber.
  
[List of Patents for class 525 subclass 332.1]    332.1Monomer contains non-conjugated diene group, or at least one fused or bridged ring or at least one cycloaliphatic structure:
 This subclass is indented under subclass 331.9.  Product wherein said diene monomer contains nonconjugated ethylenic groups, or wherein at least one monomer contains a fused or bridged ring or a cycloaliphatic structure.
(1) Note. Nonconjugated ethylenic groups denotes monomers wherein two or more ethylenically unsaturated groups are (a) separated from each other either by an aromatic ring (e.g., divinyl benzene) or (b) separated by at least one carbon atom of an acyclic carbon chain which carbon atom is not part of a methine group, e.g., -C=C-C-C=C-, etc; or (c) wherein two ethylenically unsaturated groups share a single carbon atom, etc.,

Image 1 for class 525 subclass 332.1

(2) Note. Included herein are monomers containing ethylene groups which are both conjugated an nonconjugated, e.g., myrcene:

Image 2 for class 525 subclass 332.1

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333.3,for chemically after treated solid copolymers of aromatic hydrocarbon monomers with monomers containing a fused or bridged ring or a cycloaliphatic structure and only one ethylenic group.
  
[List of Patents for class 525 subclass 332.2]    332.2Divinyl benzene:
 This subclass is indented under subclass 332.1.  Product wherein the nonconjugated ethylene monomer is divinyl benzene.
(1) Note. Divinyl benzene is often described as a cross-linking agent for a base polymer, e.g., polystyrene cross-linked with divinyl benzene, etc. Such systems will be presumed to have been prepared by interpolymerization of, e.g., styrene monomer with monomeric divinyl benzene in absence of specific disclosure that the divinyl benzene is reacted with the previously formed base polymer.

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242+,for polymers derived from ethylenic reactants only mixed with ethylenic reactant.
  
[List of Patents for class 525 subclass 332.3]    332.3Halogen containing chemical treating agent:
 This subclass is indented under subclass 331.9.  Product wherein a halogen containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 332.4]    332.4Sulfur containing chemical treating agent:
 This subclass is indented under subclass 332.3.  Product wherein a sulfur containing material is present as a chemical treating agent.
(1) Note. Said sulfur containing material may be either a halogenating agent or an additional nonhalogen containing material.
  
[List of Patents for class 525 subclass 332.5]    332.5Vulcanized in the presence of a chemical treating agent, e.g., cured, crosslinked, etc.:
 This subclass is indented under subclass 331.9.  Product wherein said solid polymer is vulcanized in the presence of a chemical treating agent.
(1) Note. The terms curing or hardening are presumed to be synonymous with vulcanizing or cross-linking in absence of disclosure to the contrary. For the instant subclass, any other language will be sufficient which shows that the chemical modification changes the system from thermoplastic (or soluble) to thermosetting (or insoluble). The term chain-extending is presumed not to express cross-linking in absence of disclosure to contrary.
  
[List of Patents for class 525 subclass 332.6]    332.6Sulfur containing chemical treating agent:
 This subclass is indented under subclass 332.5.  Product wherein a sulfur containing material is present as a chemical treating agent.
  
[List of Patents for class 525 subclass 332.7]    332.7Nitrogen containing chemical treating agent:
 This subclass is indented under subclass 332.6.  Product wherein a nitrogen containing material is present as a chemical treating agent.
(1) Note. The nitrogen atom can be present as a separate compound or as part of the sulfur containing material.
  
[List of Patents for class 525 subclass 332.8]    332.8Interpolymer with aliphatic hydrocarbon monomer (includes additional diene monomer):
 This subclass is indented under subclass 331.9.  Product wherein said monomer containing at least two ethylenic groups is interpolymerized with an ethylenically unsaturated aliphatic hydrocarbon monomer.
(1) Note. Included herein are interpolymers of two or more aliphatic diene monomers.
  
[List of Patents for class 525 subclass 332.9]    332.9Interpolymer with aromatic hydrocarbon:
 This subclass is indented under subclass 331.9.  Product wherein said monomer containing at least two ethylenic groups is interpolymerized with an ethylenically unsaturated aromatic hydrocarbon monomer.
  
[List of Patents for class 525 subclass 333.1]    333.1Isoprene or diene rubber other than butadiene rubber:
 This subclass is indented under subclass 331.9.  Product wherein the solid polymer which has been chemically modified is described as a diene rubber other than butadiene or is derived from isoprene monomer.
(1) Note. For purposes of this subclass, materials nominally described as a rubber or elastomer are presumed to be a diene rubber other than butadiene.

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331.9,for a rubbery copolymer of Butadiene.
333.2,for a rubbery homopolymer of Butadiene.
  
[List of Patents for class 525 subclass 333.2]    333.2Butadiene homopolymer:
 This subclass is indented under subclass 332.1.  Product wherein the sole monomer is butadelene (i.e., butadiene homopolymer).
  
[List of Patents for class 525 subclass 333.3]    333.3Polymer derived from aromatic hydrocarbon monomer, e.g., styrene, etc.:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer has been derived from an ethylenically unsaturated aromatic hydrocarbon monomer.
  
[List of Patents for class 525 subclass 333.4]    333.4Halogenated polymer:
 This subclass is indented under subclass 333.3.  Product wherein the said solid polymer has been halogenated.
(1) Note. The halogen is introduced subsequent to formation of the solid polymer.
(2) Note. Halogen must be present in the final product.

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333.6,for quaternized polystyrene produced by reacting an amine with post halogenated polystyrene followed by reaction with quaternizing agent.
  
[List of Patents for class 525 subclass 333.5]    333.5Sulfur containing chemical treating agent:
 This subclass is indented under subclass 333.3.  Product wherein a sulfur containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 333.6]    333.6Nitrogen containing chemical treating agent:
 This subclass is indented under subclass 333.3.  Product wherein a nitrogen containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 333.7]    333.7Polymer derived from acyclic hydrocarbon monomer only:
 This subclass is indented under subclass 326.1.  Product wherein the chemically modified solid polymer has been derived solely from an acyclic hydrocarbon monomer.
  
[List of Patents for class 525 subclass 333.8]    333.8Air, elemental oxygen, ozone or peroxide chemical:
 This subclass is indented under subclass 333.7.  Product wherein air, elemental oxygen, ozone or a peroxide compound has been employed as a chemical treating agent.
  
[List of Patents for class 525 subclass 333.9]    333.9Sulfur containing chemical treating agent:
 This subclass is indented under subclass 333.7.  Product wherein a sulfur containing chemical treating agent has been employed.
  
[List of Patents for class 525 subclass 334.1]    334.1Halogenated polymer:
 This subclass is indented under subclass 333.7.  Product wherein said solid polymer has been halogenated.
(1) Note. The halogen is introduced subsequent to formation of the solid polymer.

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570Organic Compounds,   subclasses 101+ , for acyclic halogenated hydrocarbons, e.g., halogenated liquid polyisobutylene, etc.
  
[List of Patents for class 525 subclass 337]    337Chemical treating agent contains boron or boron-containing compound other than boron trihalide or nonmetal complex thereof:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of boron, per se, or in the presence of a boron-containing compound, said boron compound being other than (a) boron trihalide, per se, (b) or a boron trihalide complexed with a nonmetal organic moiety.

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55,for boron trihalide ether, per se.
385,for a boron trihalide ether complex.
  
[List of Patents for class 525 subclass 338]    338Chemical treating agent contains elemental hydrogen or an elemental hydrogen-liberating compound, e.g., hydrogenation, etc.:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of hydrogen or in the presence of a hydrogen liberating compound, e.g., hydrogenating,etc.
(1) Note. The hydrogen liberating compound must under the anticipated process conditions, liberate elemental hydrogen.
(2) Note. The ionization of hydrogen containing materials is not considered as being an elemental hydrogen liberating process and such compounds are therefore classified elsewhere in the schedule.
  
[List of Patents for class 525 subclass 339]    339Treating in the presence of an elemental metal or inorganic metallic compound:
 This subclass is indented under subclass 338.  Subject matter wherein the chemical treating performed in the presence of an elemental metal or in the presence of an inorganic metal-containing compound.
  
[List of Patents for class 525 subclass 340]    340Chemical treating agent contains a phosphorus atom:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of a phosphorus or in the presence of a phosphorus-containing compound.
  
[List of Patents for class 525 subclass 341]    341Contains a sulfur atom:
 This subclass is indented under subclass 340.  Subject matter wherein the chemical treating is performed in the presence of a compound which contains at least one phosphorus atom and at least one sulfur atom.
  
[List of Patents for class 525 subclass 342]    342Chemical treating agent contains a silicon atom:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of silicon or in the presence of a silicon-containing compound.
  
[List of Patents for class 525 subclass 343]    343Chemical treating agent contains a sulfur atom:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of a sulfur-containing atom.
  
[List of Patents for class 525 subclass 344]    344Inorganic sulfur compound contains sulfur atom bonded to at least two oxygen atoms:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of an inorganic sulfur compound which contains at least one sulfur atom bonded to at least two oxygen atoms.
  
[List of Patents for class 525 subclass 345]    345With peroxide, ozone, or free oxygen:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of at least two materials, one of which is a sulfur-containing material, and one of which is free oxygen, ozone, or a compound containing an -O-O- group.
(1) Note. This subclass includes only those processes wherein there is a desired and intentional contact between air and the polymer to be treated.
  
[List of Patents for class 525 subclass 346]    346With sulfur-free organic compound:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of at least two materials, one of which is a sulfur-containing material, and one of which is an organic compound which is devoid of sulfur atoms.
  
[List of Patents for class 525 subclass 347]    347Sulfur-free organic compound contains a heterocyclic nitrogen:
 This subclass is indented under subclass 346.  Subject matter wherein the organic compound which is devoid of sulfur contains a nitrogen atom as a ring member of a heterocyclic ring compound.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "heterocyclic".
  
[List of Patents for class 525 subclass 348]    348Sulfur-containing heterocyclic compound:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of a heterocyclic compound which contains at least one sulfur atom.
(1) Note. The sulfur atom for purposes of this subclass need not be part of the heterocyclic ring system.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "heterocyclic".
  
[List of Patents for class 525 subclass 349]    349Heterocyclic ring contains sulfur and nitrogen atoms:
 This subclass is indented under subclass 348.  Subject matter wherein a compound containing at least one sulfur atom and at least one nitrogen atom as ring members of a single heterocyclic ring is present during a chemical treating operation.
  
[List of Patents for class 525 subclass 350]    350Mercaptan or mercaptide:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of a mercaptan or mercaptide thereof.
(1) Note. A mercaptan denotes an organic compound having the general structure -C-SH wherein the carbon atom bound to the sulfur atom of the thiol group is not double bonded to oxygen, sulfur, selenium, or tellurium, or triple bonded to nitrogen.
(2) Note. A mercaptide denotes a salt of a mercaptan.
  
[List of Patents for class 525 subclass 351]    351Organic compound contains sulfur and nitrogen atoms:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of an organic compound which contains at least one sulfur atom and at least one nitrogon atom.
  
[List of Patents for class 525 subclass 352]    352One or more sulfur atoms of the nitrogen-containing compound are double bonded to carbon:
 This subclass is indented under subclass 351.  Subject matter wherein the chemical treating is performed in the presence of an organic compound which contains at least one atom of sulfur and at least one nitrogen atom, with the proviso that at least one sulfur atom therein is double bonded to a carbon

Image 1 for class 525 subclass 352

  
[List of Patents for class 525 subclass 353]    353Sulfur compound contains sulfur atom bonded to at least two oxygen atoms, e.g., sulfonate, etc.:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of a compound which has at least one sulfur atom bonded to at least two oxygen atoms, e.g., sulfonate, sulfate, etc.
  
[List of Patents for class 525 subclass 354]    354Elemental sulfur or inorganic sulfur compound:
 This subclass is indented under subclass 343.  Subject matter wherein the chemical treating is performed in the presence of elemental sulfur on in the presence of an inorganic sulfur-containing compound.
  
[List of Patents for class 525 subclass 355]    355Chemical treating agent contains hydrogen halide, elemental halogen, organic halogen-containing compound, or compound containing only halogen atoms:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of a compound containing only hydrogen and halogen atoms, or in the presence of elemental halogen, or in the presence of an organic halogen-containing compound; or in the presence of a compound solely composed of diverse halogen atoms.
  
[List of Patents for class 525 subclass 356]    356Treating in the presence of elemental halogen:
 This subclass is indented under subclass 355.  Subject matter wherein the chemical treating is performed in the presence of elemental halogen.
  
[List of Patents for class 525 subclass 357]    357Treating in the presence of a metal or metal containing compound:
 This subclass is indented under subclass 356.  Subject matter wherein the chemical treating is performed in the presence of a metal or metal-containing compound.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "metal".
  
[List of Patents for class 525 subclass 358]    358Treating in the presence of water:
 This subclass is indented under subclass 356.  Subject matter wherein the chemical treating is performed in the presence of water.
  
[List of Patents for class 525 subclass 359.1]    359.1Treating in the presence of organic halogen-containing compound:
 This subclass is indented under subclass 355.  Subject matter wherein the chemical treating is performed in the presence of a halogen-containing organic compound.
  
[List of Patents for class 525 subclass 359.2]    359.2Organic halogen-containing compound contains a hetero ring:
 This subclass is indented under subclass 359.1.  Subject matter wherein the halogen-containing compound contains at least one nitrogen, sulfur, oxygen, selenium, or tellurium atom as part of a heterocyclic ring.
  
[List of Patents for class 525 subclass 359.3]    359.3Organic halogen-containing compound contains oxygen:
 This subclass is indented under subclass 359.1.  Subject matter wherein the halogen-containing compound contains at least one oxygen atom.
  
[List of Patents for class 525 subclass 359.4]    359.4Organic halogen-containing compound contains a (C=O)O group or an aromatic group:
 This subclass is indented under subclass 359.3.  Subject matter wherein said compound contains either a (C=O)O group or an aryl group.

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292,for a halogenated benzoquinone.
  
[List of Patents for class 525 subclass 359.5]    359.5Organic halogen-containing compound contains only carbon, hydrogen, and halogen:
 This subclass is indented under subclass 359.1.  Subject matter wherein the chemical-treating compound contains either carbon, hydrogen and halogen only, or carbon and halogen only.
  
[List of Patents for class 525 subclass 359.6]    359.6Organic halogen-containing compound contains an aromatic group:
 This subclass is indented under subclass 359.5.  Subject matter wherein said chemical-treating compound contains at least one aryl group.
  
[List of Patents for class 525 subclass 360]    360Chemical treating agent contains elemental metal or metal-containing compound:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of an elemental metal or in the presence of a compound containing a metal.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "metal".
  
[List of Patents for class 525 subclass 361]    361Two or more diverse elemental metals or compounds thereof; or same metal in two or more distinct compounds; or diverse metals in same compound:
 This subclass is indented under subclass 360.  Subject matter containing a compound which has two or more diverse metal atoms, or a mixture of two or more diverse elemental metals, or a mixture of the same or diverse metal atoms in two or more distinct compounds, or a mixture of an elemental metal and a metal compound.
  
[List of Patents for class 525 subclass 362]    362Elemental metal or inorganic compound thereof only:
 This subclass is indented under subclass 361.  Subject matter containing only elemental metals, or only inorganic metal compounds, or only an elemental metal and an inorganic metal compound.
(1) Note. Compounds which are free of metal atoms are included herein when in admixture with elemental metals or inorganic metal compounds.

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361,for a mixture of a metal containing organic compound and an elemental metal or metal containing inorganic compound.
  
[List of Patents for class 525 subclass 363]    363Aluminum or group IIB (Zn, Cd, Hg) metal or compound thereof:
 This subclass is indented under subclass 362.  Subject matter containing aluminum or a Group IIB (Zn, Cd, Hg) elemental metal or inorganic compound thereof.
  
[List of Patents for class 525 subclass 364]    364Organometallic compound and elemental metal or inorganic compound thereof:
 This subclass is indented under subclass 361.  Subject matter containing at least one organometallic compound and at least an elemental metal or inorganic compound thereof.
  
[List of Patents for class 525 subclass 365]    365Aluminum metal or compound thereof:
 This subclass is indented under subclass 364.  Subject matter containing elemental aluminum or a compound thereof.
(1) Note. The aluminum atom can be in the form of a free metal or in the form of an inorganic or organic compound.
  
[List of Patents for class 525 subclass 366]    366Contains group IA (Li, Na, K, Rb, Cs, Fr) or group IIA (Be, Mg, Ca, Sr, Ba, Ra) elemental metal or compound thereof:
 This subclass is indented under subclass 360.  Subject matter containing a Group IA (Li, Na, K, Rb, Cs, Fr) or Group IIA (Be, Mg, Ca, Sr, Ba, Ra) elemental metal or compound thereof.
  
[List of Patents for class 525 subclass 367]    367Elemental metal or inorganic metal compound:
 This subclass is indented under subclass 366.  Subject matter containing an elemental metal or an inorganic compound thereof.
  
[List of Patents for class 525 subclass 368]    368Metal oxide:
 This subclass is indented under subclass 367.  Subject matter containing a metal oxide.
(1) Note. Oxides for this subclass are binary compounds consisting of only a metal atom and oxygen.

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361+,for an oxide containing two diverse metal atoms.
  
[List of Patents for class 525 subclass 369]    369Metal hydroxide:
 This subclass is indented under subclass 367.  Subject matter containing an inorganic metal hydroxide, i.e., Me+OH-.
  
[List of Patents for class 525 subclass 370]    370Contains group IB (Cu, Ag, Au), IIB (Zn, Cd, Hg,) IIIA (Al, Ga, In, Tl), IV (Ti, Zr, Hf, Ge, Sn, Pb), and VIII (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) elemental metal or compound thereof:
 This subclass is indented under subclass 360.  Subject matter containing a Group IB (Cu, Ag, Au), IIB (Zn, Cd, Hg), IIIA (Al, Ga, In, Tl) IVB (Ti, Zr, Hf), IVA (Ge, Sn, Pb) or Group VIII (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) metal atom.
  
[List of Patents for class 525 subclass 371]    371Elemental metal or inorganic compound thereof:
 This subclass is indented under subclass 370.  Subject matter containing an elemental metal or inorganic compound thereof.
  
[List of Patents for class 525 subclass 372]    372Metal oxide:
 This subclass is indented under subclass 371.  Subject matter containing a metal oxide.
(1) Note. Oxides for this subclass are binary compounds consisting of only a metal atom and oxygen.

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361+,for an oxide containing two diverse metal atoms.
  
[List of Patents for class 525 subclass 373]    373Group IIB metal (Zn, Cd, Hg) oxide:
 This subclass is indented under subclass 372.  Subject matter wherein the oxide is solely composed of a Group IIB (Zn, Cd, Hg) metal atom and oxygen.
  
[List of Patents for class 525 subclass 374]    374Chemical treating agent is a nitrogen-containing compound:
 This subclass is indented under subclass 55.  Subject matter under subclass wherein the chemical treating is performed in the presence of a nitrogen-containing compound.
  
[List of Patents for class 525 subclass 375]    375Contains nitrogen atom in a heterocyclic ring:
 This subclass is indented under subclass 374.  Subject matter wherein the chemical treating agent contains a compound having at least one atom of nitrogen and carbon in the same ring and wherein the other atoms of the ring may be oxygen, selenium, or tellurium.

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343+,for treating in the presence of a heterocyclic sulfur-containing compound.
  
[List of Patents for class 525 subclass 376]    376Nitrogen-containing compound has at least one nitrogen-to-nitrogen bond:
 This subclass is indented under subclass 374.  Subject matter wherein the nitrogen compound contains a nitrogen atom bonded to at least one atom of nitrogen (e.g., azo, hydrazine, N2F4, etc.).
  
[List of Patents for class 525 subclass 377]    377Nitrogen-containing compound contains at least one nitrile or isonitrile group; or a nitrogen-to-oxygen bond which is other than as an amine or ammonium salt:
 This subclass is indented under subclass 374.  Subject matter wherein the chemical treating is performed in the presence of a compound containing a -C=N or a -N=C group, or wherein a nitrogen atom is directly bonded to an oxygen atom.
  
[List of Patents for class 525 subclass 378]    378Ammonia, ammonium hydroxide, or salts thereof:
 This subclass is indented under subclass 374.  Treatment wherein the nitrogen-containing compound is ammonia, ammonium hydroxide, or an organic or inorganic ammonium salt.
  
[List of Patents for class 525 subclass 379]    379Organic amine:
 This subclass is indented under subclass 374.  Treatment wherein the organic nitrogen compound contains an amine group.
(1) Note. An amine denotes an organic compound having a nitrogen atom singly or double bonded to a carbon atom and wherein the carbon atom bonded to the nitrogen atom is devoid of a double bond to oxygen, sulfur, selenium, or tellurium or triple bond to nitrogen. In addition, those compounds wherein the same nitrogen atom is bonded to a (>C=X) group (X is O, S, Se, or Te) and to a carbon atom which is not double-bonded to oxygen, sulfur, selenium, or tellurium, are not considered as being amines (e.g., -C-NH-C(=X)-. Although amides may be considered chemically as amines, it has been found expedient for these classes to exclude compounds containing only amide nitrogen herefrom. Therefore, as used throughout this area, the term amide is not to be confused with an amine. A compound, however, which contains a nitrogen atom bonded to a non carbon atom and which contains either a nitrogen atom bonded to a (>C=X) group or an amide group, is considered as being an amine, e.g.,

Image 1 for class 525 subclass 379

  
[List of Patents for class 525 subclass 380]    380Amine contains a hydroxyl group:
 This subclass is indented under subclass 379.  Subject matter wherein the amine compound contains a hydroxyl group.
(1) Note. A hydroxyl group herein is that of an alcohol.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "alcohol".
  
[List of Patents for class 525 subclass 381]    381Three or more amine groups:
 This subclass is indented under subclass 379.  Treatment wherein the amine compound contains three or more amine groups.
(1) Note. An amine proper for this subclass requires (a) at least three distinct nitrogen atoms bonded to at least two distinct carbon atoms, or (b) the presence of at least three nitrogen atoms bonded to the same carbon atom.

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379,(1) Note, for a discussion of what constitutes an "amine" in this area.
  
[List of Patents for class 525 subclass 382]    382Two amine groups:
 This subclass is indented under subclass 379.  Treatment wherein the amine compound contains two amine groups.
(1) Note. An amine proper for this subclass requires (a) at least two distinct ntirogen atoms bonded to at least two distinct carbon atoms, or (b) the presence of at least two nitrogen atoms bonded to the same carbon atom.

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379,(1) Note, for a discussion of what constitutes an "amine" in this area.
  
[List of Patents for class 525 subclass 383]    383Chemical treating agent contains elemental oxygen or oxygen-containing compound:
 This subclass is indented under subclass 55.  Subject matter wherein the chemical treating is performed in the presence of oxygen or in the presence of an oxygen containing compound.
  
[List of Patents for class 525 subclass 384]    384Oxygen compound contains at least one alcohol group:
 This subclass is indented under subclass 383.  Subject matter wherein the chemical treating agent is an alcohol.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "alcohol".
  
[List of Patents for class 525 subclass 385]    385Oxygen compound contains an ether group:
 Subject matter under subcalss 383 wherein the oxygen compound is an ether.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "ether".
  
[List of Patents for class 525 subclass 386]    386Oxygen compound is a carboxylic acid, ester, anhydride, or lactone thereof:
 This subclass is indented under subclass 383.  Subject matter wherein the oxygen-containing compound is a carboxylic acid, ester thereof, anhydride thereof, or a lactone thereof.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "carboxylic acid or derivative", which defines the following terms: "carboxylic acid", "carboxylic acid ester", "anhydride", and "lactone".
  
[List of Patents for class 525 subclass 387]    387Oxygen compound contains a peroxy group (-O-O-):
 This subclass is indented under subclass 383.  Subject matter wherein the oxygen-containing compound contains at least one oxygen atom bonded directly to another oxygen atom, i.e., -O-O-.

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388,for processes of treating in the presence of air, oxygen, or ozone.
  
[List of Patents for class 525 subclass 388]    388Specified oxygen-containing compound is air, elemental oxygen, or ozone:
 This subclass is indented under subclass 383.  Subject matter wherein the oxygen-containing compound is identified as air, as elemental oxygen, or as ozone.
(1) Note. This subclass includes only those processes wherein there is a desired and intentional contact between air and the polymer to be treated.
  
[List of Patents for class 525 subclass 389]    389Solid polymer derived from reactant containing atoms other than C, H, N, Si, P, chalcogen, halogen, or an alkali or alkaline earth metal in salt form:
 This subclass is indented under subclass 50.  Subject matter involves the process of mixing a solid polymer derived from a reactant containing elements other than C, H, N, P, Si, chalcogen or halogen with an additional solid polymer, with specified polymer-forming ingredients, specfied intermediate condensation product, chemical treating agent, or with an ethylenic agent; processes of reacting the above mixtures of products resulting from the mixing or reacting processes.
(1) Note. Chalcogen is limited to oxygen, sulfur, selenium, or tellurium.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the terms "specified polymer-forming ingredients" or "specified intermediate condensation product".
  
[List of Patents for class 525 subclass 390]    390Solid polymer derived solely from phenolic reactants wherein none of the reactants contains a plurality of methylol groups or derivatives thereof:
 This subclass is indented under subclass 50.  Subject matter involving processes of mixing a solid polymer derived from phenolics as sole reactants wherein none of the reactants forming the solid polymer contains a plurality of methylol groups or is a derivative thereof with an additional solid polymer, with specified polymer-forming ingredients, with a specified intermediate condensation product, chemical treating agent, or with an elthylenic agent; or processes of forming or reacting, or the resultant products of any of the above mixtures.
(1) Note. This subclass includes solid polymers prepared from a multiplicity of phenolic reactants.
(2) Note. The term "phenolic reactant" is limited to phenols, phenol ether, and phenolate salt.
(a) A phenol for purposes of this subclass requires one or more -OH groups directly bonded to a nuclear carbon atom of a substituted or unsubstituted benzene ring, which benzene ring can be an individual benzene ring or can be part of a polycyclic ring system.
(b) A phenol ether for purposes of this subclass requires one or more -O-C groups wherein the oxygen atom of the -O-C group is directly bonded to a nuclear carbon atom of a substituted or unsubstituted benzene ring and wherein the carbon atom of the -O-C group is not double-bonded to oxygen, sulfur, selenium, or tellurium or triple-bonded to nitrogen. The benzene ring may be an individual benzene ring or may be part of a polycyclic ring system. The following examples of phenol ether are within the definition set out above.
(1) The -O-C group may itself be part of a cyclic ring system, e.g.,

Image 1 for class 525 subclass 390

(2) The carbon of the -O-C group may be a ring atom of a cyclic or aromatic ring, e.g.,

Image 2 for class 525 subclass 390

(3) The carbon of the -O-C group may be a terminal carbon atom, e.g., as in the first illustration below, or may be the carbon atom of a chain, e.g., as in the second illustration, below.

Image 3 for class 525 subclass 390

Image 4 for class 525 subclass 390

(c) An inorganic phenolate salt is an inorganic salt of a phenol see (phenol (1) Note) above wherein the hydrogen atom of an -OH group is replaced by a metal or an inorganic group.

SEE OR SEARCH THIS CLASS, SUBCLASS:

480+,for solid polymers derived from a phenolic reactant containing a plurality of methylol groups from a derivative thereof.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for definitions of the terms "specified polymer-forming ingredients", "specified intermediate condensation product", and "methylol or methylol derivative".
  
[List of Patents for class 525 subclass 391]    391Mixed with ethylenically unsaturated reactant or polymer derived therefrom:
 This subclass is indented under subclass 390.  Subject matter wherein the solid phenolic polymer is mixed with an ethylenically unsaturated agent or polymer derived therefrom.

SEE OR SEARCH THIS CLASS, SUBCLASS:

132+,for a solid polymer from a phenolic reactant admixed or reacted with a solid polymer derived from ethylenic reactants only.
  
[List of Patents for class 525 subclass 392]    392Unsaturated aromatic reactant or polymer thereof:
 This subclass is indented under subclass 391.  Subject matter wherein an unsaturated reactant or polymer derived therefrom contains an aromatic group.
  
[List of Patents for class 525 subclass 393]    393Mixed with silicon-containing reactant or polymer derived therefrom:
 This subclass is indented under subclass 390.  Subject matter wherein the solid phenolic polymer is mixed with a silicon-containing reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 394]    394Mixed with -O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal containing reactant or polymer derived therefrom:
 This subclass is indented under subclass 390.  Subject matter wherein the solid phenolic polymer is mixed with a -O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal-containing reactant or polymer thereof.
  
[List of Patents for class 525 subclass 395]    395Mixed with -N=C=X-containing reactant or polymer therefrom (X is chalcogen):
 This subclass is indented under subclass 390.  Subject matter wherein the solid phenolic polymer is mixed with a -N=C=X or blocked -N=C=X-containing reactant or polymer derived therefrom (X is a chalcogen).
(1) Note. Blocking a -N=C=X (masked, hidden, etc.) is utilized to render the -N=C=X group inert by conversion to an inactive group. The process of reactivation usually involves merely heating so as to revert the blocked reactant to a C-N=C=X-containing reactant. The usual mode of rendering the -N=C=X reactant inert is to convert it to the form of a -NO- group.
  
[List of Patents for class 525 subclass 396]    396Mixed with 1, 2-epoxy containing reactant or polymer therefrom, or wherein polymer contains at least one 1, 2-epoxy group:
 This subclass is indented under subclass 390.  Subject matter wherein the solid phenolic polymer is mixed with a 1, 2-epoxy group-containing reactant or polymer derived therefrom, or wherein a polymer contains at least one 1, 2-epoxy group.
  
[List of Patents for class 525 subclass 397]    397Mixed with carboxylic acid or derivative reactant or polymer derived therefrom:
 This subclass is indented under subclass 390.  Subject matter wherein the solid phenolic polymer is mixed with a carboxylic acid or derivative or polymer derived therefrom.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 398]    398Solid polymer derived from aldehyde, aldehyde derivative, or low molecular weight polymer thereof as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof:
 This subclass is indented under subclass 50.  Subject matter involves processes of mixing solid polymer derived from an aldehyde, aldehyde derivative, or low molecular weight polymers thereof as sole reactants wherein none of the reactants contains plural methylol groups or is a derivative thereof, with an additional solid polymer, with specified polymer-forming ingredients, with a specified intermediate condensation product, with a chemical treating agent or with ethylenic agent; processes of reacting these mixtures or products resulting from the mixing or reacting processes.
(1) Note. This subclass includes homo- or copolymers of only aldehyde or aldehyde derivative reactants.
(2) Note. This subclass includes solid polymers prepared from a multiplicity of aldehyde or aldehyde derivative reactants.
(3) Note. An aldehyde derivative for purposes of this subclass includes:
(a) Compounds having X-CH2OH group wherein X is other than carbon or hydrogen. Included herein are paraformaldehyde, methylol derivative of urea, etc.
(b) Heterocyclic compounds having only carbon and oxygen as ring atoms in an alternating manner and in equal amount,

Image 1 for class 525 subclass 398

(c) Hexamethylenetetramine or derivative e.g., as illustrated below; a derivative of this type requires the basic ring structure of hexamethylenetetramine but wherein the hydrogen atoms may have been replaced by other atoms.

Image 2 for class 525 subclass 398

(4) Note. Compounds having a methylol group (-CH2OH) bonded to atoms other than carbon, oxygen, or hydrogen are regarded for this subclass as being a mixture of two compounds one of which is formaldehyde. For instance, a methylol derivative of melamine is regarded as being a mixture of melamine and formaldehyde. Methylol urea is regarded as being a mixture of formaldehyde and urea.
(5) Note. Solid paraformaldehyde polymers will be regarded as monomeric formaldehyde.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition the terms "methylol", "methylol derivative", "aldehyde", "specified polymer-forming ingredients", or "specified intermediate condensation product".
526Synthetic Resins or Natural Rubbers,   subclass 315 for a polymer derived from an ethylenically unsaturated aldehyde as sole reactant or for an interpolymer derived from only ethylenically unsaturated reactants wherein at least one of the ethylenically unsaturated reactants contains an aldehyde group.
528Synthetic Resins or Natural Rubbers,   subclass 403 for heterocyclic oxygen-containing reactants such as dioxolane, dioxepan, etc.; and subclasses 480+ for processes of treating a polymer not involving a chemical modification of the polymer, by the addition of a material thereto, and for chemically modifying material other than the polymer. Subclasses 480+ also provide for processes of admixing with a broadly claimed nonreactant material.
  
[List of Patents for class 525 subclass 399]    399Mixed with -N=C=X-containing reactant or polymer derived therefrom (X is chalcogen):
 This subclass is indented under subclass 398.  Subject matter wherein a solid polymer derived from an aldehyde or aldehyde derivative is mixed with -N=C=X or blocked -N=C=X reactant or polymer derived therefrom (X is chalcogen).

SEE OR SEARCH THIS CLASS, SUBCLASS:

395,for a discussion of the term "blocked".
  
[List of Patents for class 525 subclass 400]    400Mixed with carboxylic acid or derivative reactant or polymer derived therefrom:
 This subclass is indented under subclass 398.  Subject matter wherein a solid polymer derived from an aldehyde or aldehyde derivative is mixed with a carboxylic acid or derivative reactant or polymer derived therefrom.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition for a definition of the term "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 401]    401Mixed with ethylenically unsaturated reactant or polymer derived therefrom:
 This subclass is indented under subclass 398.  Subject matter wherein a solid polymer derived from an aldehyde or derivative is mixed with an ethylenically unsaturated reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 402]    402Solid polymer derived from aldehyde or derivative containing halogen:
 This subclass is indented under subclass 398.  Subject matter wherein the solid polymer is derived from an aldehyde or aldehyde derivative which contains halogen.
  
[List of Patents for class 525 subclass 403]    403Solid polymer derived from 1,2-epoxy compound containing only one 1,2-epoxy group as sole reactant and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof:
 This subclass is indented under subclass 50.  Subject matter involves processes of mixing a solid polymer derived only from 1,2-epoxy compounds all of which contains only a single 1,2-epoxy group and none of which contains a plurality of methylol or methylol derivative groups with an additional solid polymer with specified polymer-forming ingredients, with a specified intermediate condensation product, with a chemical treating agent or with an ethylenic reactant; processes of reacting the above mixtures; or products resulting from the mixing or reacting processes (e.g., polyepihalohydrin, ethylene oxide-epihalohydrin copolymer, etc.).
(1) Note. This subclass includes solid polymers prepared from a multiplicity of reactants all of which contain a single 1,2-epoxy group.
(2) Note. Excluded from this subclass are any 1,2-epoxy reactants which contain a plurality of methylol or methylol derivative groups. See the Glossary for the definition of "methylol derivative".
(3) Note. This subclass includes homo- or co-polymers of only 1,2-epoxy reactants containing a single 1,2-epoxy group.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   subclass 273 for homopolymers of glycidyl acrylate.
  
[List of Patents for class 525 subclass 404]    404Mixed with ethylenically unsaturated reactant or polymer therefrom:
 This subclass is indented under subclass 403.  Subject matter wherein the solid polymer derived from 1,2-epoxy reactants only containing a single 1,2-epoxy group is mixed with an ethylenically unsaturated reactant or polymer thereof.
  
[List of Patents for class 525 subclass 405]    405Mixed with aldehyde or aldehyde derivative reactant or polymer therefrom:
 This subclass is indented under subclass 403.  Subject matter wherein the solid polymer derived from 1,2-epoxy reactants only containing a single 1,2-epoxy group is mixed with an aldehyde or aldehyde derivative reactant or polymer derived therefrom.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   for a definition of the term "aldehyde" or "aldehyde derivative".
  
[List of Patents for class 525 subclass 406]    406Contains amine-, N-C(=X)-, or N-S(=O)- containing reactant (X is chalcogen):
 This subclass is indented under subclass 405.  Subject matter which also contains an amine-, N-C(=)-, or N-S(=O)- containing reactant (X is chalcogen).
(1) Note. The amine-, N-C(=)-, or N-S(=O)- containing reactant need not be added simultaneously with the aldehyde or aldehyde derivative reactant.
  
[List of Patents for class 525 subclass 407]    407Mixed with 1,2-epoxy reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom:
 This subclass is indented under subclass 403.  Subject matter wherein the solid polymer derived from 1,2-epoxy reactant only containing a single 1,2-epoxy group is mixed with an epoxy reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom.
  
[List of Patents for class 525 subclass 408]    408Mixed with carboxylic acid or derivative or polymer derived therefrom:
 This subclass is indented under subclass 403.  Subject matter wherein the solid polymer derived from 1,2-epoxy reactants only containing a single 1,2-epoxy group is mixed with a carboxylic acid or derivative reactant or polymer derived therefrom.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   for a definition of the term "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 409]    409Solid polymer derived only from 1,2-epoxy reactants containing only C, H, and O:
 This subclass is indented under subclass 403.  Subject matter wherein the solid polymer is derived from only 1,2-epoxy reactants which contain only carbon, hydrogen, and oxygen atoms (e.g., ethylene oxide-propylene oxide copolymer, ethylene oxide-glycidyl methacrylate copolymer, etc.).
  
[List of Patents for class 525 subclass 410]    410Solid polymer derived from hetero-O-cyclic compounds as sole reactant wherein at least one reactant contains a hetero-O-ring other than solely as a 1,2-epoxy or anhydride, and wherein none of the reactants contains a plurality of methylol groups or derivative thereof:
 This subclass is indented under subclass 50.  Subject matter involves processes of mixing a solid polymer derived from only hetero-O-cyclic reactants and wherein at least one reactant thereof contains a hetero-O-ring other than solely as a 1,2-epoxy or anhydride and wherein none of the reactants contain a plurality of methylol groups or is a derivative thereof with additional solid polymer, specified polymer-forming ingredients, specified intermediate condensation product, chemical treating agent or ethylenic agent; processes of reacting the above mixtures; or products resulting from the mixing or reacting processes, e.g., dioxane homopolymers, trioxane-ethylene oxide copolymers, etc.
(1) Note. Cyclic anhydrides and 1,2-epoxy groups are not considered as being hetero-O-cyclic and proper for this subclass. When these groups are present, however, there must be an additional hetero-O-ring present. This additional ring may be part of the 1,2-epoxy or anhydride group-containing compound or it may be a separate compound which is devoid of 1,2-epoxy or anhydride ring.
(2) Note. This subclass includes homo- or co-polymers of only hetero-O-cyclic compounds.
  
[List of Patents for class 525 subclass 411]    411Mixed with carboxylic acid or derivative reactant or polymer therefrom:
 This subclass is indented under subclass 410.  Subject matter wherein the solid polymer derived from only hetero-O-cyclic reactant is mixed with a carboxylic acid or derivative reactant or polymer derived therefrom.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   for a definition of the term "carboxylic acid or derivative".
  
[List of Patents for class 525 subclass 412]    412Mixed with unsaturated reactant or polymer therefrom:
 This subclass is indented under subclass 410.  Subject matter wherein solid polymer derived from only hetero-O-cyclic reactant is mixed with an ethylenically unsaturated reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 413]    413Mixed with -O-C(=O)- or hal-C(=O)- reactant or polymer derived therefrom:
 This subclass is indented under subclass 410.  Subject matter wherein the solid polymer derived from only hetero-O-cyclic reactant is mixed with a -O-C(=O)- or hal-C(=O)- reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 414]    414Mixed with aldehyde or aldehyde derivative or polymer derived therefrom:
 This subclass is indented under subclass 410.  Subject matter wherein the solid polymer derived from only hetero-O-cyclic reactant is mixed with an aldehyde or aldehyde derivative reactant or polymer derived therefrom.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   for a definition of the terms "aldehyde" and "aldehyde derivative".
  
[List of Patents for class 525 subclass 415]    415Solid polymer derived from carboxylic acid cyclic ester, e.g., lactone, etc.:
 This subclass is indented under subclass 410.  Subject matter wherein the solid polymer is derived from only hetero-O-cyclic reactants which is derived from a carboxylic acid ester, i.e., -(C=O)n -O- (n is one or more and is part of a heterocyclic ring and the carbon atom single-bonded to the oxygen atom of the -(C=O)n-O- group is not double bonded to oxygen, sulfur, selenium, tellurium, or triple-bonded to nitrogen).
  
[List of Patents for class 525 subclass 416]    416Solid polymer derived from hydrocarbon or halogenated hydrocarbon as sole reactant or mixture thereof:
 This subclass is indented under subclass 50.  Subject matter involves processes of mixing solid polymer derived from only hydrocarbons or halogenated hydrocarbon reactants or mixtures thereof with additional solid polymer, with specified polymer-forming ingredients, with specified intermediate condensation product, with chemical treating agent, or with ethylenic agent; processes or products resulting from the above mixing processes.
(1) Note. This subclass provides for a solid copolymer derived from hydrocarbons and halogenated hydrocarbons (e.g., dichlorobenzene-xylene copolymers, etc.) or for solid polymers derived from only hydrocarbons or halogenated hydrocarbons.
  
[List of Patents for class 525 subclass 417]    417Solid polymer derived from heterocyclic materials as sole reactants wherein each of the heterocyclic materials contains a hetero ring other than solely as a lactam, 1,2-epoxy or carboxylic acid anhydride and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof:
 This subclass is indented under subclass 50.  Subject matter involving processes of mixing a solid polymer derived from heterocyclic materials as sole reactants other than solely as a lactam, 1,2-epoxy, or carboxylic acid anhydride, with an additional solid polymer and wherein none of the heterocyclic materials contains a plurality of methylol groups or derivatives thereof, with specified intermediate condensation product, with specified polymer-forming ingredients, with chemical treating agent or with ethylenic agent; processes or products resulting from the mixing processes (e.g., polyepisulfide, polyethylenimine, etc.).
(1) Note. This subclass does not regard a lactam, 1,2-epoxy group, or cyclic carboxylic acid anhydride as being heterocyclic and, therefore, when these groups are present must be part of a compound which contains a heterocyclic group proper for this subclass.
(2) Note. Excluded from this subclass are any heterocyclic reactants which contain a plurality of methylol groups or derivatives thereof and see the Glossary and subclass 398 for a definition of the terms "methylol" and "methylol derivative".

SEE OR SEARCH THIS CLASS, SUBCLASS:

509+,for methylolated melamine since this is not considered a single reactant but a mixture of two reactants, namely, melamine and formaldehyde.

SEE OR SEARCH CLASS:

526Synthetic Resins or Natural Rubbers,   for a definition of the term "carboxylic acid or derivative" which defines "lactum".
  
[List of Patents for class 525 subclass 418]    418Solid polymer derived from at least one carboxylic acid or derivative:
 This subclass is indented under subclass 50.  Subject matter involves processes of mixing a solid polymer derived from at least one carboxylic acid or derivative with additional solid polymer, with specified polymer-forming ingredients, with an intermediate condensation product, chemical treating agent or with ethylenic agent; processes of reacting the above mixtures or products resulting from the above processes.
(1) Note. A derivative of a carboxylic acid is limited to a nitrile, ester, anhydride, salt, amide, imide, lactam, lactone, and acyl halide.
(2) Note. In carboxylic acids and their derivatives, certain compounds may have more than one function, e.g., a lactone is a species of esters, a lactam is a species of an amide. Compounds which are multifunctional are classified on the basis of the first appearing function provided in the subclass hierarchy.
(3) Note. A polycarboxylic acid reactant for purposes of this subclass requires the presence of at least two carboxylic acid groups. A polycarboxylic derivative requires at least one carboxylic acid group and at least one carboxylic acid derivative, or at least two identical carboxylic acid derivatives, or at least two different carboxylic acid derivatives.
(4) Note. For purposes of this subclass an anhydride having the general formula, -C-(C(=O)-O-C(=O))n-C-, which may be linear or cyclic, is considered as being a polycarboxylic acid. A compound having both an anhydride and a free carboxylic acid is considered as being a tricarboxylic acid, e.g., as in the first illustration below, and a compound containing two anhydride groups is considered as being a tetracarboxylic acid, e.g., as in the second illustration, below.

Image 1 for class 525 subclass 418

Image 2 for class 525 subclass 418

(5) Note. An imide is considered as being a dicarboxylic acid derivative.
(6) Note. An organic amine salt of a carboxylic acid has been classified as if it were a mixture of an amine and a carboxylic acid. An organic diamine salt of a dicarboxylic acid where the amine salt-forming groups are identical is considered as being a single amine compound, whereas if the amine groups are different then they are regarded as two amine compounds. Where the compound contains two or more nitrogen atoms bonded to the same or different noncarbonyl carbon atom then they are to be regarded as polyamines.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for the definition of "amine" and for a furthur elucidation of "carboxyclic acid or derivative".
528Synthetic Resins or Natural Rubbers,   subclass 263 , for an explanation of the term "polyamine".
  
[List of Patents for class 525 subclass 419]    419Solid polymer derived from at least one lactam; from an amino carboxylic acid or derivative; or from a polycarboxylic acid or derivative:
 This subclass is indented under subclass 418.  Subject matter wherein the solid polymer derived from a carboxylic acid or derivative, is derived from at least one lactam, from an amino carboxylic acid or derivative, or from a polycarboxylic acid or derivative.
  
[List of Patents for class 525 subclass 420]    420Solid polymer derived from an amino carboxylic acid or derivative; from a polyamine and a polycarboxylic acid or derivative from at least one lactam; or from a polyamine salt of a polycarboxylic acid:
 This subclass is indented under subclass 419.  Subject matter wherein the solid polymer is derived from amino carboxylic acid or derivative, from a polyamine reactant and a polycarboxylic acid reactant or derivative, from at least one lactam reactant, or from a polyamine salt of a polycarboxylic acid.
  
[List of Patents for class 525 subclass 420.5]    420.5Solid polymer derived from a polycarboxylic acid which is a dimer or trimer of an aliphatic acyclic monocarboxylic acid having at least ten carbon atoms or adducts of unsaturated aliphatic acyclic monocarboxylic acids, having ten carbon atoms with an alpha, beta ethylenically unsaturated carboxylic acid or derivative:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is derived from a polycarboxylic acid which is a dimer or trimer of an aliphatic acyclic monocarboxylic acid having at least ten carbon atoms or an adduct of an unsaturated aliphatic acyclic monocarboxylic acids, having ten carbon atoms with an alpha, beta ethylenically unsaturated carboxylic acid or derivative.
(1) Note. Hydrogenated forms of the dimer and trimer acids are included herein.
(2) Note. The solid polymer containing the dimer, trimer, or adduct polycarboxylic acid need not be the solid polymer described in this subclass.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   for the definition of "dimer or trimer of an aliphatic carboxylic acid".
528Synthetic Resins or Natural Rubbers,   subclass 339.5 for polyamides from, e.g., dimer acid, adipic acid and a polyamine, etc.
562Organic Compounds,   subclass 509 for adducts of fatty acids with alpha, beta ethylenically unsaturated dicarboxylic acids and for the dimer or trimer, per se.
564Organic Compounds,   subclasses 152+ for polyamides, per se, produced from dimer acid and polyamines.
  
[List of Patents for class 525 subclass 421]    421Solid polymer derived from reactant containing ethylenic unsaturation:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is derived from a reactant containing ethylenic unsaturation.
(1) Note. The ethylenically unsaturated reactant may be the carboxylic acid or may be an additional reactant, e.g., maleic anhydride, 1,4-diaminobutene-2, etc.
  
[List of Patents for class 525 subclass 422]    422Solid polymer derived from imide reactant:
 This subclass is indented under subclass 421.  Subject matter wherein the solid polymer is derived from an imide reactant.
  
[List of Patents for class 525 subclass 423]    423Mixed with reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with a reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom.
  
[List of Patents for class 525 subclass 424]    424Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen):
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with an -N=C=X or blocked -N=C=X reactant or polymer derived therefrom (X is chalcogen).

SEE OR SEARCH THIS CLASS, SUBCLASS:

395,for a discussion of the term "blocked".
  
[List of Patents for class 525 subclass 425]    425Mixed with polycarboxylic acid or derivative and polyhydroxy reactant or polymer therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with a polycarboxylic acid or derivative reactant and a polyhydroxy reactant or reaction product resulting therefrom.
(1) Note. It is unnecessary for the polycarboxylic acid and polyhydroxy reactant to be added to the solid polymer simulataneously. The only requirement is that both reactants be added to the solid polymer sometime during the mixing and/or reacting processes.
  
[List of Patents for class 525 subclass 426]    426Mixed with ethylenically unsaturated reactant or polymer therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with an ethylenically unsaturated reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 427]    427Mixed with aldehyde or aldehyde derivative reactant or polymer therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with an aldehyde or aldehyde derivative reactant or polymer derived therefrom.
(1) Note. Hexamethylenetetramine is regarded for this subclass as an aldehyde derivative and not as an amine reactant. Reactions therewith are in this subclass.
  
[List of Patents for class 525 subclass 428]    428Contains amine-, N-C(=X)-, or N-S(=O)-containing reactant or polymer thereof (X is chalcogen):
 This subclass is indented under subclass 427.  Subject matter which contains an amine, N-C(=X)-, N-S(=O)-containing reactant (X is chalcogen) which is not in the solid polymer backbone or a polymer thereof.
(1) Note. The amine, N-C(=X)- or N-S(=O)- containing reactant can be part of, or in addition to, the aldehyde or aldehyde derivative reactant.

SEE OR SEARCH CLASS:

520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "phenolic reactant".
  
[List of Patents for class 525 subclass 429]    429Contains phenolic reactant or polymer thereof:
 This subclass is indented under subclass 427.  Subject matter which contains a phenolic reactant (which is not in the solid polymer backbone) or a polymer thereof.
(1) Note. The phenolic reactant or polymer thereof can be in addition to the aldehyde or aldehyde derivative or can be in the same compound. See the Glossary for a definition of the term "phenolic".
  
[List of Patents for class 525 subclass 430]    430Mixed with a reactant containing a single 1,2-epoxy group per mole or polymer derived therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with a reactant containing only one 1,2-epoxy group per mole or polymer derived therefrom.
  
[List of Patents for class 525 subclass 431]    431Mixed with silicon reactant or polymer derived therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with a silicon-containing reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 432]    432Mixed with additional polycarboxylic acid and a polyamine; amino carboxylic acid or derivative; polyamine salt of a polycarboxylic acid; lactam; or polymer derived therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with a polycarboxylic acid and a polyamine, with an amino carboxylic acid, with a polyamine salt of a polycarboxylic acid, with a lactam, or with a polymer of the materials derived above.
  
[List of Patents for class 525 subclass 433]    433Mixed with O-C(=O)-O-, hal-C(=O)-, or hal-C(=O)-hal reactant or polymer derived therefrom:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is mixed with a O-C(=O)-O, hal-C-(=O)-, or halhal reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 434]    434Solid polymer derived from hydroxyl group-containing reactant:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer derived from an amino carboxylic acid, from a polyamine reactant and a polycarboxylic acid or derivative, from at least one lactam reactant, or from a polyamine salt of a polycarboxylic acid, is also derived from a hydroxy-containing reactant.
  
[List of Patents for class 525 subclass 435]    435Solid polymer derived from compound containing more than two amine groups:
 This subclass is indented under subclass 420.  Subject matter wherein solid polymer is derived from a compound containing more than a two amine groups.
  
[List of Patents for class 525 subclass 436]    436Solid polymer derived from compound containing more than two carboxylic acid groups or derivatives thereof:
 This subclass is indented under subclass 420.  Subject matter wherein the solid polymer is derived from a compound containing more than two carboxylic acid groups or from a derivative of a carboxylic acid, e.g.,

Image 1 for class 525 subclass 436

  
[List of Patents for class 525 subclass 437]    437Solid polymer derived from polyhydroxy reactant and polycarboxylic acid or derivative reactant; or derived from di- or higher ester of a polycarboxylic acid as sole reactant:
 This subclass is indented under subclass 419.  Subject matter wherein the solid polymer is derived from a polyhydroxy reactant and a polycarboxylic acid or derivative reactant; or from a di- or higher ester of a polycarboxylic acid as sole reactant.
  
[List of Patents for class 525 subclass 438]    438Mixed with reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from a polycarboxylic acid or derivative reactant and a polyhydroxy reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant is mixed with a reactant containing more than one 1,2-epoxy group per mole or polymer derived therefrom.
  
[List of Patents for class 525 subclass 439]    439Mixed with O-C(=O)-O-, hal-C(=O)-O-, or hal-C(=O)-hal containing reactant or polymer derived therefrom; or wherein solid polymer is derived from a hal-C(=O)-hal, O-C(=O)-O-, or hal-C(=O)-O-, a polycarboxylic acid or derivative and a polyhydroxy reactant:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from a polycarboxylic acid or derivative and a polyhydroxy reactant or from a di- or higher ester of polycarboxylic acid as sole reactant is mixed with O-C(=O)-O-, hal-C(=O)-O-, hal-C(=O)-hal-,containing reactant or polymer thereof; or wherein the solid polymer is derived from a polycarboxylic acid or derivative, a polyhydroxy reactant and a O-C(=O)-O-, hal-C(=O)-O-, hal-C(=O)-hal-,containing reactant.
  
[List of Patents for class 525 subclass 440.01]    440.01Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen); or wherein solid polymer is derived from an -N=C=X reactant and also a polycarboxylic acid or derivative and a polyhydroxy reactant:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from polycarboxylic acid or derivative reactant and polyhydroxy reactant or from a di- or a higher ester of a polycarboxylic acid as sole reactant, is mixed with an -N=C=X or blocked -N=C=X reactant or polymer derived therefrom; or wherein the solid polymer is derived from a polycarboxylic acid or derivative reactant, a polyhydroxy reactant, and an -N=C=X or blocked -N=C=X reactant (X is chalcogen).
(1) Note. This subclass provides for a solid polymer derived from at least one polyol and at least one polycarboxylic acid mixed with an -N=C=X reactant, as well as solid polymers d erived from at least one polyol, polycarboxylic acid and a compound containing -N=C=X groups mixed with a chemical treating agent.
  
[List of Patents for class 525 subclass 440.02]    440.02Blocked isocyanate reactant or polymer derived therefrom:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or reacted with a group convertible to an -N=C=X group, or an -N=C=X group previously reacted with a blocking group.
(1) Note. Blocking an – N=C=X (masked, hidden, etc) is utilized to render the – N=C=X group inert by conversion to an inactive group. The process of reactivation usually merely involves merely heating the blocked reactant to a – N=C=X reactant. The usual mode of rendering is to convert it to the form of a NO- group. Examples of blocking groups include, but are not limited to uretidiones, carbamates, carbodiimides, etc .
  
[List of Patents for class 525 subclass 440.03]    440.03Silicon, phosphorus, or halogen containing reactant or polymer derived therefrom:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with a silicon, phosphorus, or halogen containing reactant.
  
[List of Patents for class 525 subclass 440.04]    440.04Heterocyclic containing reactant or polymer derived therefrom other than as an anhydride of a polycarboxylic acid:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with a heterocyclic containing reactant, and wherein the heterocyclic reactant is other than as an anhydride of a polycarboxylic acid.
  
[List of Patents for class 525 subclass 440.05]    440.05Sulfur, selenium, or tellurium containing reactant other than X in an – N=C=X group or polymer derived therefrom, or in an -N-(C=X)-X- gr oup:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with a sulfur, selenium, or tellurium containing reactant and wherein X is other than X in an -N=C=X group or polymer derived therefrom, or wherein the X atom is other than in an -N-(C=X)-X group.
  
[List of Patents for class 525 subclass 440.06]    440.06Nitrogen containing reactant other than N in an -N=C=X group or polymer thereof, or in a N-(C=X)-X- group:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with a nitrogen containing reactant other than N in an -N=C=X group or polymer thereof, or wherein the nitrogen atom is in other than an -N-(C=X)-X group.
  
[List of Patents for class 525 subclass 440.07]    440.07Reactant contains ethylenic unsaturation:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with a reactant containing at least one ethylenic group.
  
[List of Patents for class 525 subclass 440.071]    440.071N=C=X reactant or polymer derived therefrom contains ethylenic unsaturation:
 This subclass is indented under subclass 440.07.  Subject matter wherein the N=C=X reactant contains at least contains at least one ethylenic group.
  
[List of Patents for class 525 subclass 440.072]    440.072Polyhydroxy reactant contains ethylenic unsaturation:
 This subclass is indented under subclass 440.07.  Subject matter wherein the polyhydroxy reactant contains at least one ethylenic group.
  
[List of Patents for class 525 subclass 440.08]    440.08Fused or bridged ring system containing, or non-aryl carbocyclic ring containing reactant:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with a fused- or bridged-ring system containing reactant, or non-aryl carboxylic ring containing reactant.

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520,Synthetic Resins or Natural Rubbers, the Glossary, for a definition of the term "fused or bridged ring system."
  
[List of Patents for class 525 subclass 440.09]    440.09Reactant contains an aryl group directly bonded to an oxygen atom:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from or has been reacted with at least one reactant containing an aryl group directly bonded to an oxygen atom.
  
[List of Patents for class 525 subclass 440.11]    440.11N=C=X reactant or polymer derived therefrom contains plural ether linkages:
 This subclass is indented under subclass 440.01.  Subject matter wherein the -N=C=X reactant or polymer derived therefrom contains plural ether linkages.
  
[List of Patents for class 525 subclass 440.12]    440.12N=C=X reac tant or polymer derived therefro m contains at least one aryl group:
 This subclass is indented under subclass 440.01.  Subject matter wherein the -N=C=X reactant or polymer derived therefrom contains at least one aryl group.
  
[List of Patents for class 525 subclass 440.13]    440.13Solid polymer derived from polycarboxylic acid or derivative and a polyhydroxy compound is derived from a hydroxy containing carboxylic acid or derivative reactant:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from a single reactant which contains at least one hydroxyl group and at least one carboxylic acid group or derivative.
  
[List of Patents for class 525 subclass 440.14]    440.14Solid polymer derived from polycarboxylic acid or derivative and a polyhydroxy compound wherein said polycarboxylic acid or derivative contains three or more carboxylic acid or derivative groups:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from a reactant which contains three or more carboxylic acid or derivative groups.
  
[List of Patents for class 525 subclass 440.15]    440.15Solid polymer derived from polycarboxylic acid or derivative and a polyhydroxy compound wherein said polyhydroxy reactant contains three or more hydroxy groups or contains at least one ether group:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from a reactant containing three or more hydroxyl or derivative groups, or wherein the solid polymer is derived from at least one reactant containing at least one ether group.
  
[List of Patents for class 525 subclass 440.16]    440.16Solid polymer derived from two or more polycarboxylic acid or derivatives and a single polyhydroxy compound:
 This subclass is indented under subclass 440.01.  Subject matter wherein the solid polymer is derived from two or more polycarboxylic acids or derivative reactants and a single polyhydroxy compound.
  
[List of Patents for class 525 subclass 441]    441Mixed with aldehyde or aldehyde derivative reactant or polymer derived therefrom:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from polycarboxylic acid or derivative reactant and polyhydroxy reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant is mixed with an aldehyde or aldehyde derivative reactant or polymer derived therefrom.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for definitions of the terms "aldehyde" and "aldehyde derivative".
  
[List of Patents for class 525 subclass 442]    442Contains phenolic reactant or polymer thereof:
 This subclass is indented under subclass 441.  Subject matter which contains a phenolic reactant which is not in the solid polymer backbone or a polymer thereof.
(1) Note. This subclass includes, for example, a mixture of a solid polymer derived from a polyhydroxy reactant and a polycarboxylic acid reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant with either a phenolic reactant or polymer thereof and an aldehyde or aldehyde derivative or polymer thereof or a reaction product of a phenolic reactant and an aldehyde or aldehyde derivative or wherein the phenolic moiety is in the same compound as is the aldehyde moiety.
  
[List of Patents for class 525 subclass 443]    443Contains an amine-, N-C(=X)-, or N-S(=O)- containing reactant or polymer thereof (X is chalcogen):
 This subclass is indented under subclass 441.  Subject matter which contains an amine-, N-C(=X)-, or N-S(=O)- containing reactant (X is chalcogen) or polymer thereof.
(1) Note. This subclass includes, for example, a mixture of a solid polymer derived from a polyhydroxy reactant and a polycarboxylic acid reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant with an amine--N=C=X, or N-S(=O)-containing reactant or solid polymer thereof and an aldehyde or aldehyde derivative or polymer thereof; or the reaction product of an amine-,-N=C=X, or N-S(=O)- containing reactant with an aldehyde or aldehyde derivative.

SEE OR SEARCH THIS CLASS, SUBCLASS:

441,for reactions with hexamethylenetetramine which is regarded therein as an aldehyde derivative.
  
[List of Patents for class 525 subclass 444]    444Mixed with polycarboxylic acid or derivative and polyhydroxy reactant or polymer thereof:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from a polycarboxylic acid or derivative reactant and a polyhydroxy reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant is mixed with an additional polycarboxylic acid or derivative reactant and a polyhydroxy reactant or reaction product thereof.
(1) Note. This subclass provides for blends of two or more solid polycarboxylic acid-polyhydroxy compound polyesters as well as a solid polyester and polycarboxylic acid and a polyhydroxy compound.
  
[List of Patents for class 525 subclass 444.5]    444.5Solid polymer derived from or system contains a reactant which is a fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring glyceride, tall oil, or fatty acid derived from tall oil:
 This subclass is indented under subclass 444.  Subject matter wherein (a) a solid polymer is derived from a reactant which is a fatty acid glycerol ester, a fatty acid or salt thereof derived from a naturally occurring glyceride, tall oil, or fatty acid derived from tall oil; or (b) wherein the system contains a reactant noted in (a) above as a separate reactant or as an additional reactant with the polycarboxylic acid derivative and polyhydroxy reactant or polymer thereof.

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520Synthetic Resins or Natural Rubbers,   the Glossary, for a definition of the term "fatty acid" and of other materials proper for this subclass.
  
[List of Patents for class 525 subclass 445]    445Mixed with ethylenically unsaturated reactant or polymer therefrom:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from a polycarboxylic acid or derivative and polyhydroxy reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant is mixed with an ethylenically unsaturated reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 446]    446Mixed with silicon-containing reactant or polymer derived therefrom:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from polycarboxylic acid or derivative reactant and polyhydroxy reactant or from a di- or higher ester of a polycarboxylic acid as sole reactant is mixed with a silicon-containing reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 447]    447Solid polymer derived from polycarboxylic acid or derivative and a polyhydroxy compound derived from reactant containing ethylenic unsaturation:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from a polycarboxylic acid or derivative reactant, polyhydroxy, or additional reactant is derived from a reactant containing ethylenic unsaturation.
(1) Note. The ethylenic unsaturation may be present in the polycarboxylic acid or derivative reactant, the polyhydroxy reactant, or an additional reactant.
  
[List of Patents for class 525 subclass 448]    448Solid polymer derived from polycarboxylic acid or derivative and polyhydroxy compound is derived from two or more polycarboxylic acids or derivatives:
 This subclass is indented under subclass 437.  Subject matter wherein the solid polymer derived from a polycarboxylic acid or derivative reactant and polyhydroxy reactant is derived from two or more polycarboxylic acids or derivatives as reactants.
  
[List of Patents for class 525 subclass 449]    449Mixed with 1,2-epoxy reactant or polymer derived therefrom:
 This subclass is indented under subclass 419.  Subject matter wherein solid polymer derived from a polycarboxylic acid or derivative is mixed with 1,2-epoxy reactant or polymer derived therefrom.
  
[List of Patents for class 525 subclass 450]    450Solid polymer derived from hydroxy-containing carboxylic acid or derivative reactant:
 This subclass is indented under subclass 418.  Subject matter wherein the solid polymer is derived from a hydroxyl-containing carboxylic acid or derivative reactant, e.g., lactic acid, etc.
  
[List of Patents for class 525 subclass 451]    451Solid polymer derived from carboxylic acid or derivative derived from ethylenically unsaturated reactant:
 This subclass is indented under subclass 418.  Subject matter wherein a solid polymer derived from a carboxylic acid or derivative is derived from an ethylenically unsaturated reactant.
(1) Note. The unsaturation can be in the carboxylic acid or in an additional reactant.
  
[List of Patents for class 525 subclass 452]    452Solid polymer derived from -N=C=X reactant (X is chalcogen):
 This subclass is indented under subclass 50.  Subject matter involving processes of mixing a solid polymer derived from a -N=C=X of blocked -N=C=X reactant with an additio