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 Class   521SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES
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 This Class 521 is considered to be an integral part of Class 520 (see the Class 520 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 520
 
             SYNTHETIC RESINS (CLASS 520, SUBCLASS 1)
  25           . (1 indent ) ION-EXCHANGE POLYMER OR PROCESS OF PREPARING
  26           .. (2 indent ) Process of regenerating
  27           .. (2 indent ) Membrane or process of preparing
  28           .. (2 indent ) Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymer
  29           .. (2 indent ) Polymer characterized by defined size or shape other than bead or pearl
  30           .. (2 indent ) Chemically treated solid polymer
  31           ... (3 indent ) Solid polymer derived from ethylenically unsaturated reactant only
  32           .... (4 indent ) Treated with nitrogen-containing material
  33           .... (4 indent ) Treated with sulfur-containing material
  34           ... (3 indent ) Solid polymer derived from at least one 1,2-epoxy containing reactant
  35           ... (3 indent ) Solid polymer derived from aldehyde or derivative
  36           .... (4 indent ) Treated with nitrogen-containing material
  37           .... (4 indent ) Treated with sulfur-containing reactant
  38           .. (2 indent ) From ethylenically unsaturated reactant only
  39           .. (2 indent ) From aldehyde or derivative
  40           . (1 indent ) PROCESS OF TREATING SCRAP OR WASTE PRODUCT CONTAINING SOLID ORGANIC POLYMER TO RECOVER A SOLID POLYMER THEREFROM
  40.5           .. (2 indent ) Process of treating scrap or waste product containing at least one polymer derived from ethylenic unsaturated monomers only
  41           ... (3 indent ) Treating rubber (or rubberlike materials) or polymer derived from a monomer having at least two ethylenic unsaturated moieties
  41.5           .... (4 indent ) Treating with organic phosphorus-containing material
  42           .... (4 indent ) Treating with organic nitrogen-containing material
  42.5           .... (4 indent ) Treating with organic chalcogen-containing material
  43           .... (5 indent ) Containing organic sulfur
  43.5           .... (5 indent ) Containing carboxylic acid or anhydride group
  44           .... (5 indent ) Containing hydroxyl group
  44.5           .... (4 indent ) Treating with hydrocarbon or halogenated hydrocarbon material
  45           .... (4 indent ) Treating with steam or water
  45.5           .... (4 indent ) Treating with mechanical action and in the absence of a chemically reactive additive or solvent
  46           ... (3 indent ) Treating polymer derived from a monomer containing only carbon, hydrogen, and halogen or only carbon and halogen; or treating a polymer which has been derived from at least one hydrocarbon and which has been subsequently halogenated
  46.5           .... (4 indent ) Treating polymer derived from vinyl chloride monomer
  47           ... (3 indent ) Treating polymer derived from hydrocarbon monomers only
  47.5           .. (2 indent ) Treating polysiloxane
  48           .. (2 indent ) Treating polyester
  48.5           ... (3 indent ) Treating with alcohol
  49           .. (2 indent ) Treating polyurethane, polyurea (excluding urea-formaldehyde polymers), polyisocyanurate or polycarbodiimide
  49.5           ... (3 indent ) Treating with alcohol or amine
  49.8           .. (2 indent ) Treating polycarbonamide
  50           . (1 indent ) CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC.
  50.5           .. (2 indent ) Compositions to be polymerized by wave energy in order to prepare a cellular product wherein said composition contains a rate-affecting material; or compositions to be modified by wave energy to prepare a cellular product wherein said composition contains a rate-affecting material; or processes of preparing or treating a solid polymer utilizing wave energy in order to prepare a cellular product
  51           .. (2 indent ) Processes of preparing a cellular product having an integral skin
  52           .. (2 indent ) Reticulated cellular product or processes of preparing a reticulated cellular product
  53           .. (2 indent ) Treating a cellular solid polymer by adding a material thereto which reacts with the polymer or forms a composition therewith, or products of said treating process
  54           ... (3 indent ) Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition
  55           ... (3 indent ) Treating a cellular solid polymer by adding a material thereto which forms a composition therewith
  56           .. (2 indent ) Particle which is expandible, process of preparing an expandible particle, or process of expanding a particle to form a cellular product
  57           ... (3 indent ) Including step of surface coating a particle or process of expanding a surface coated particle
  58           ... (3 indent ) Expanding utilizing plural expansion steps
  59           ... (3 indent ) Expandible system contains two or more solid polymers or at least one solid polymer and at least one polymer-forming system
  60           ... (3 indent ) Adding expanding agent subsequent to solid polymer formation
  61           .. (2 indent ) Process of preparing a cellular product by removal of material from a solid polymer-containing matrix without expanding the matrix; composition which is nonexpandible and is designed to form a cellular product by said process; or process of preparing said composition
  62           ... (3 indent ) Mixture of solid polymers present during cell formation
  63           ... (3 indent ) Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step
  64           ... (3 indent ) Removing a liquid to form a cellular product
  65           .. (2 indent ) Process of forming a cellular product from an aqueous latex, aqueous dispersion, or aqueous emulsion containing a solid polymer; process of preparing a latex, dispersion, or emulsion containing a solid polymer which is designed to be formed into a cellular product, or composition thereof
  66           ... (3 indent ) Treating a latex, dispersions, or emulsion containing a solid polymer at 32 degrees F. or below, e.g., freezing, etc.
  67           ... (3 indent ) Adding -N=C=X material to a latex, dispersion, or emulsion containing a solid polymer
  68           ... (3 indent ) Adding fibrous material to a latex, dispersion, or emulsion containing a solid polymer
  69           ... (3 indent ) Latex, dispersion, or emulsion contains an additional solid polymer-forming system
  70           ... (3 indent ) Latex, dispersion, or emulsion contains two or more solid polymers
  71           ... (3 indent ) Solid polymer is derived from a conjugated diene monomer
  72           ... (3 indent ) Utilizing cell forming agent other than air
  73           .. (2 indent ) Process of preparing a cellular product of a plastisol of a solid polymer derived solely from ethylenically unsaturated monomers; forming a plastisol of a solid polymer derived solely from an ethylenically unsaturated monomer which is designed to be formed into a cellular product, or composition thereof
  74           ... (3 indent ) By incorporation of material in gaseous state
  75           ... (3 indent ) System contains two or more solid polymers or contains at least one solid polymer and at least one polymer-forming system
  76           .. (2 indent ) Preparing a cellular product utilizing a stated ingredient which is surface coated or is a discrete solid particle containing a fluid encapsulated therein, processes of forming an expandible composition, containing said stated ingredient or composition therefrom
  77           .. (2 indent ) Preparing a cellular product by decomposition of a solid polymer; or process of forming a composition containing a solid polymer which decomposes so as to subsequently form a cellular polymer, or composition therefrom
  78           .. (2 indent ) Preparing a cellular product by spraying a solid polymer containing material
  79           .. (2 indent ) Extruding a solid polymer containing material to form a cellular product
  80           ... (3 indent ) Including solid polymer formation in or during extruding step
  81           ... (3 indent ) System contains a mixture of solid polymer or at least one solid polymer and at least one solid polymer-forming system
  82           .. (2 indent ) Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same
  83           ... (3 indent ) Ingredient is asphaltic, bituminous, or water settable inorganic material, e.g., cement, plaster of Paris, etc.
  84.1           ... (3 indent ) Ingredient is protein, carbohydrate, or natural resin
  85           ... (3 indent ) Ingredient contains a boron or phosphorus atom
  86           ... (3 indent ) Ingredient is organic silicon compound
  87           ... (3 indent ) Ingredient is aldehyde or ketone
  88           ... (3 indent ) Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc.
  89           ... (3 indent ) Ingredient contains a sulfur atom
  90           ... (3 indent ) Ingredient is a heterocyclic compound
  91           ... (3 indent ) Ingredient contains a silicon atom
  92           ... (3 indent ) Ingredient contains a metal atom
  93           .... (4 indent ) Metal atom is part of an organic compound
  94           ... (3 indent ) Ingredient is a nitrogen containing compound
  95           .... (4 indent ) Nitrogen compound contains a nitrogen atom bonded to a nitrogen or oxygen atom
  96           ... (3 indent ) Ingredient contains an -O-O- group
  97           ... (3 indent ) Ingredient contains a carbon atom double-bonded to oxygen, e.g., carbon dioxide, carboxylic acid, etc.
  98           ... (3 indent ) Ingredient contains only C and H atoms, only C and halogen atoms, or only C, H, and halogen atoms
  99           .. (2 indent ) Cellular product formation prior to or during solid polymer formation in the presence of a stated ingredient other than water
  100           ... (3 indent ) Ingredient is water settable inorganic composition
  101           ... (3 indent ) Ingredient is bituminous or asphaltic material
  102           ... (3 indent ) Ingredient is a protein containing material
  103           ... (3 indent ) Ingredient contains a boron atom
  104           .... (4 indent ) Boron trihalide or complex thereof
  105           .... (4 indent ) Boron atom is part of an organic compound
  106           ... (3 indent ) Ingredient contains a phosphorus atom
  107           .... (4 indent ) Phosphorus atom is part of an organic compound
  108           .... (5 indent ) Organic phosphorus compound contains a phosphorus atom bonded to an atom other than oxygen
  109.1           ... (3 indent ) Ingredient is carbohydrate, or natural resin
  110           ... (3 indent ) Ingredient contains a silicon atom as part an organic compound
  111           .... (4 indent ) Organic silicon atom compound contains an atom other than oxygen, hydrogen, silicon, or carbon
  112           .... (4 indent ) Organic silicon compound contains an ether group
  113           ... (3 indent ) Ingredient is aldehyde or ketone
  114           ... (3 indent ) Ingredient contains a -C-X-C- group wherein X is a chalcogen atom and none of the C atoms bonded to the chalcogen are double-bonded to an additional chalcogen atom
  115           .... (4 indent ) -C-X-C- compound contains a nitrogen atom
  116           .... (4 indent ) -C-X-C- compound contains a -C-XH group wherein X is a chalcogen atom
  117           ... (3 indent ) Ingredient contains a -C-XH group wherein X is a chalcogen atom and the carbon atom is not double-bonded to a chalcogen atom, phenol, etc.
  118           .... (4 indent ) -C-XH ingredient contains a nitrogen atom
  119           ... (3 indent ) Ingredient is inorganic halogen containing material
  120           ... (3 indent ) Ingredient contains a sulfur atom
  121           .... (4 indent ) Sulfur atom is part of an organic compound
  122           ... (3 indent ) Ingredient contains a silicon atom
  123           ... (3 indent ) Ingredient contains a metal atom
  124           .... (4 indent ) Metal atom is part of an organic compound
  125           .... (5 indent ) Organic metal compound contains a Group I or Group II metal atom
  126           .... (5 indent ) Organic metal compound contains tin
  127           ..... (6 indent ) Tin compound is dibutyl tin dilaurate or stannous octoate
  128           ... (3 indent ) Ingredient is a nitrogen containing compound
  129           .... (4 indent ) Nitrogen compound contains a nitrogen atom bonded to three carbon atoms and wherein none of the carbon atoms are double-bonded to oxygen
  130           ... (3 indent ) Ingredient contains a carbon atom double bonded to oxygen, e.g., carboxylic acid, etc.
  131           ... (3 indent ) Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms
  132           .... (4 indent ) Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.
  133           ... (3 indent ) Ingredient is gaseous at ambient conditions, e.g., air, oxygen, etc.
  134           .. (2 indent ) Cellular product derived from two or more solid polymers or from at least one solid polymer and at least one polymer-forming system
  135           ... (3 indent ) At least one polymer is derived from reactant containing two or more three membered heterocyclic rings having two carbon atoms and one chalcogen atom or polymer-forming system contains the same type of reactant
  136           ... (3 indent ) At least one polymer is derived from an aldehyde or derivative or wherein the polymer-forming system contains the same type of reactant
  137           ... (3 indent ) At least one polymer is derived from a -N=C=X reactant wherein X is a chalcogen atom or wherein the polymer-forming system contains the same type of reactant
  138           ... (3 indent ) At least one polymer is derived from a polycarboxylic acid or derivative and a polyol or wherein the polymer-forming system containing the same type of reactants
  139           ... (3 indent ) At least one polymer is derived from an ethylenically unsaturated aromatic reactant or wherein the polymer-forming system contains the same type of reactant
  140           ... (3 indent ) At least one polymer is derived from reactant containing two or more ethylenic groups or wherein the polymer-forming system contains the same type of reactant
  141           .. (2 indent ) Cellular vinyl alcohol polymer
  142           .. (2 indent ) Cellular product derived from ethylenically unsaturated reactants only
  143           ... (3 indent ) From acyclic mono-unsaturated hydrocarbon as only reactant
  144           .... (4 indent ) Interpolymer
  145           ... (3 indent ) From acyclic mono-unsaturated halogenated reactant
  146           ... (3 indent ) From aromatic reactant
  147           .... (4 indent ) With oxygen or nitrogen containing reactant
  148           .... (4 indent ) With conjugated diene reactant
  149           ... (3 indent ) From oxygen containing reactant
  150           ... (3 indent ) From reactant containing two or more ethylenic unsaturated groups
  151           .. (2 indent ) Cellular polymer derived from tar, pitch, bitumen, asphalt, or plant material of unknown constitution, e.g., nut shell liquor, etc.
  152           .. (2 indent ) Cellular product derived from boron containing reactant
  153           .. (2 indent ) Cellular product derived from aluminum or heavy metal containing reactant
  154           .. (2 indent ) Cellular product derived from silicon containing reactant
  155           .. (2 indent ) Cellular product derived from a -N=C=X containing reactant wherein X is a chalcogen atom
  156           ... (3 indent ) With three-membered heterocyclic reactant containing two carbon atoms and a hetero atom (i.e., nitrogen or a chalcogen atom)
  157           ... (3 indent ) With a C-C(=X)-XH or C-C(=X)-X-C(=X)-C- reactant wherein X is a chalcogen atom, e.g., carboxylic acid or anhydride, etc.
  158           ... (3 indent ) With ketone, aldehyde, or aldehyde derivative
  159           ... (3 indent ) N=C=X reactant having at least two C-NH-C(=X)- groups, e.g., prepolymers, etc.
  160           ... (3 indent ) Two or more N=C=X reactants
  161           ... (3 indent ) N=C=X reactant contains a heterocyclic ring
  162           ... (3 indent ) N=C=X reactant contains atoms other than carbon and hydrogen and other than nitrogen and chalcogen as part of the N=C=X group
  163           ... (3 indent ) With nitrogen containing reactant
  164           .... (4 indent ) Nitrogen reactant contains a C-XH group wherein X is a chalcogen atom and wherein the C atom is not double-bonded to a chalcogen atom
  165           .... (5 indent ) Phosphorus containing reactant
  166           .... (5 indent ) Nitrogen reactant contains a nitrogen containing heterocyclic ring
  167           .... (5 indent ) Nitrogen reactant contains a N-(C-C-O)-group
  168           ... (3 indent ) With phosphorus containing reactant
  169           .... (4 indent ) Phosphorus reactant contains a -O-(C-C-O-)-group
  170           ... (3 indent ) With -XH reactant wherein X is a chalcogen atom
  171           .... (4 indent ) -XH reactant contains a halogen atom
  172           .... (4 indent ) -XH reactant contains a C=X group, e.g., carboxylic acid ester, etc.
  173           .... (5 indent ) With non -C=X containing reactant
  174           .... (4 indent ) -XH reactant contains a C-X-C group
  175           .... (5 indent ) C-X-C reactant contains a carbohydrate group
  176           .... (5 indent ) With non -C-X-C- containing reactant
  177           .... (5 indent ) C-X-C reactant contains a carbocyclic ring, e.g., aromatic, etc.
  178           .. (2 indent ) Cellular product derived from a reactant containing two or more three membered heterocyclic rings wherein two of the ring members are carbon atoms and the remaining ring member is a chalcogen atom
  179           ... (3 indent ) With -C(=X)-X containing reactant wherein X is a chalcogen atom
  180           .. (2 indent ) Cellular product derived from a phenol, phenol ether, or inorganic phenolate reactant
  181           ... (3 indent ) With reactant which is an aldehyde or aldehyde derivative
  182           .. (2 indent ) Cellular product derived from a -C-C(=X)-X containing reactant wherein X is a chalcogen atom, e.g., phthalic acid, etc.
  183           ... (3 indent ) Nitrogen containing reactant
  184           .... (4 indent ) Nitrogen reactant contains at least two amino nitrogen atoms
  185           .... (5 indent ) Carbocyclic reactant containing -C-C(=X)-X, e.g., containing carboxyl, etc.
  186           .. (2 indent ) Cellular product derived from reactant which is an aldehyde or aldehyde derivative
  187           ... (3 indent ) Nitrogen containing reactant
  188           .... (4 indent ) Nitrogen reactant contains a -N-C(=X)-N group wherein X is a chalcogen atom, e.g.,urea, etc.
  189           .. (2 indent ) Cellular product derived from reactant containing a carbon to chalcogen bond
 
 CROSS-REFERENCE ART COLLECTIONS
 
  901           CELLULAR POLYMER CONTAINING A CARBODIIMIDE STRUCTURE
  902           CELLULAR POLYMER CONTAINING AN ISOCYANURATE STRUCTURE
  903           CELLULAR POLYMER HAVING REDUCED SMOKE OR GAS GENERATION
  904           POLYURETHANE CELLULAR PRODUCT HAVING HIGH RESILIENCY OR COLD CURE PROPERTY
  905           HYDROPHILIC OR HYDROPHOBIC CELLULAR PRODUCT
  906           POLYURETHANE CELLULAR PRODUCT CONTAINING UNREACTED FLAME-RETARDANT MATERIAL
  907           NONURETHANE FLAMEPROOFED CELLULAR PRODUCT
  908           NUCLEATING AGENT FOR CELLULAR PRODUCT
  909           BLOWING-AGENT MODERATOR, E.G., KICKERS, ETC.
  910           PLURAL BLOWING AGENTS FOR PRODUCING NONPOLYURETHANE CELLULAR PRODUCTS
  911           SURFACTANT FOR OTHER THAN POLYURETHANE CELLULAR PRODUCT
  912           SEPARATED REACTIVE MATERIALS UTILIZED IN PREPARING CELLULAR PRODUCT
  913           CELL FORMING IN ABSENCE OF EXTERNAL HEAT
  914           POLYURETHANE CELLULAR PRODUCT FORMED FROM A POLYOL WHICH HAS BEEN DERIVED FROM AT LEAST TWO 1,2 EPOXIDES AS REACTANTS
  915           UTILIZING ELECTRICAL OR WAVE ENERGY DURING CELL FORMING PROCESS
  916           CELLULAR PRODUCT HAVING ENHANCED DEGRADABILITY
  917           SPECIALIZED MIXING APPARATUS UTILIZED IN CELL FORMING PROCESS
  918           PHYSICAL AFTERTREATMENT OF A CELLULAR PRODUCT
  919           SINTERED PRODUCT
  920           CELLULAR PRODUCT CONTAINING A DYE OR PIGMENT
  921           PREPARING A NONPOLYURETHANE CELLULAR PARTICLE FROM A NONPARTICULATE MATERIAL
 
 FOREIGN ART COLLECTIONS
 
  FOR000           CLASS-RELATED FOREIGN DOCUMENTS


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