Class 526 provides for all processes of preparing polymers from only ethylenically unsaturated monomers and for all products thereof when such products and processes are not provided in higher subclasses in the Class 260 schedule hierarchy.
In addition, Class 526 provides for certain polymerization processes which are applicable to any type of reactant or monomer.

LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
A. The following rules apply to claim classification in the area encompassing subclasses 72 through 352.2 of this class.
(1) For purposes of clarification in this schedule, subclasses 59-238 will be deemed to be process subclasses, and subclasses 239-352.2 will be indicated as being product subclasses.
(2) Patents that claim a product and process, wherein both the product and the process are specifically provided for in the schedule, are classified in the process area (59-238) and cross-referenced to the product area (239-352.2).
(3) Patents that claim a provided for process (59-238) and a nonprovided for process (other than 89) but where the monomers being polymerized are provided (239- 352.2) are classified in the process area (59-238) and cross-referenced into the product area on the basis of the first appearing monomer in the schedule that is being polymerized (239-352.2).
(4) Patents that claim both a provided for (239-352.2) product and a process of polymerizing (59-238) and wherein the product is claimed in process terms are classified on the basis of the process (59-238) and cross-referenced to the
first appearing monomer in the schedule utilized in preparing the polymer.
(5) Patents that claim a product solely in process terms are classified on the basis of the process (59-238) when said process is provided in the schedule and cross-referenced to the first appearing monomer in the schedule utilized in preparing the polymer.
(6) Patents that claim a product in process terms and wherein the process is not provided in subclasses (59-238) are classified on the basis of the first appearing monomer in the schedule utilized in preparing the polymer.
(7) Patents that claim a polymerizable composition or the preparation of a polymerizable composition are classified on the basis of the first apearing monomer (239-352.2) in the schedule that is part of the polymerizable composition.
(8) Patents that claim a polymer only are classified on the basis of the first appearing monomer in the schedule (239-352.2) that has been polymerized in preparing the polymer.
(9) Patents that claim merely vulcanizing, curing, or cross-linking of a polymer proper for this area, without the presence of a specified vulcanizing, curing, or cross-linking agent, or the amount of the chemical agent or the vulcanized, cured or cross-linked product of such a reaction are classified on the basis of the first appearing monomer in the schedule (239-352.2) that has been polymerized in preparing the polymer.
(10) Patents that claim a polymer which is the result of a degradation of a polymer proper for this area (239-352.2) and wherein the degradation has been effected in the absence of any chemical agent are classified on the basis of the initial first appearing monomer in the schedule (239-352.2) that has been polymerized in preparing the previously-formed polymer that is degraded.
(11) Each product subclass, subclasses 239-352.2 unless specifically limites in its title, includes homopolymers and interpolymers.
(12) "Interpolymerized" as used throughout the product area subclasses 239-352.2 includes all combinations of the necessary monomers as required in the definition of the particular subclass in combination with any other monomer not provided for in a higher subclass of the schedule.
(13) A monomer for purposes of this subclass is a material which occurs in a polymer as a repeating unit and is present in at least three units and as used herein "monomer" is meant to exclude catalyst residues, chain transfer agents, etc; however, a nonethylenic carbohydrate or nonethylenic protein which is present during polymerization of an ethylenic
monomer and which is described as chemically bonded to the polymer is proper subject matter for Class 527, subclasses 313+.
(14) This subclass provides for processes wherein an ethylenically unsaturated monomer is undergoing polymerization and concurrently therewith is reacting with a second ethylenic material, which second ethylenic material does not enter into the polymer backbone, e.g., polymerizing acrylic acid in the presence of allyl alcohol so that the final polymer is a polymerized acrylic acid having ester groups which are derived from the unsaturated alcohol.
(15) The sole requirement for the products of this subclass is that the polymerization reaction involve only ethylenic unsaturated monomers. Note, however, that the actual polymerization mechanism need not involve the ethylenically unsaturated group (e.g., polymerization of a glycidyl methylacrylate may involve the double bond in one instance and in another instance may involve the ring opening of the epoxy group, etc.).
(16) The treatment of a liquid polymer derived from an unsaturated monomer which is to be further polymerized is regarded as involving polymerization rather than as an after-treatment of a polymeric polymer and is therefore classified in this area as against the chemical after-treatment area, Class 525, subclasses 326.1+.
(17) In subclasses 239-352.2 each indent of a specific form of "from monomer" only refers to species of that type monomer and not to other monomers that may be interpolymerized therewith. When other monomers which are not species of the "from monomers" are to be taken into account the subclass has been identified as "interpolymerized."
B. The following are lines relating to special subclasses:
(1) Subclasses 218.1+, 219.3+, 219.6
(1) Note. A patent which recites a polymerization process which utilizes (a) a material proper for subclasses 218.1+ in combination with either a specified or nonspecified amount of "hydrocarbon or halohydrocarbon" will not be classified in subclass 219.3 or its indents, but will be found in 219.6 or 218.1+; proper, however, for subclass 219.3 or its indents is the situation wherein when either the hydrocarbon or halohydrocarbon is defined in some degree (e.g., dihalogenated, dibrominated, contains specified chain length, boiling or freezing point range, etc.); (b) a "free radical" catalyst with either a specified or nonspecified amount of "hydrocarbon or halohydrocarbon" will be classified with the polymer providing this was the only remaining basis for classification.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein a process parameter is determined and some polymerization 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 and classification of such a process will be accorded on some other basis.

This subclass is indented under subclass 59. Subject matter wherein a polymerization process parameter is altered in response to the composition or composition property and wherein the composition property is other than density, per se.
(1) Note. Included within the definition of composition or composition property is the determination of the identity of a component or the relative amount of a component in a stream, electrical conductivity, redox, potential, pH measurement, molecular weight, melt index, optical properties, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
59 for a process involving measurement of density, per se, followed by a control operation in response to the measurement.

This subclass is indented under subclass 59. Processes wherein a polymerization process parameter is altered in response to a determination of temperature or pressure.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein the polymerization reaction takes place in (1) a reactor of specified material; or (2) a reactor part is of a specified material; or (3)wherein the reactor or part of the reactor has been treated in some manner.
(1) Note. Specified material includes a recitation that the reactor material be free from certain specified material.
(2) Note. Included herein but not limited to the enumerated examples are stainless steel and glass-lined reactors, reactor parts such as titanium stirrers, and reactors that have been subjected to a specified wash or the application of a coating material.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein heat exchange or reduction of particle size of a polymerizing polymer is effected by direct contact of said polymerizing polymer with an inert-solid mass which solid is not an internal part of the polymerization apparatus or of the processing apparatus.
(1) Note. "Inert-solid mass" includes steel shot and ceramic rollers.
(2) Note. This subclass does not include indirect cooling or heating (e.g., cooling outside of reactor so as to cool reactor contents, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:
88 for mixing, agitating, etc. of a polymerizing polymer utilizing a stirrer or some other means which means or stirrer is part of the apparatus or processing equipment.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein polymerization is effected in a loop or tubular reactor.
(1) Note. A loop reactor for purposes of this subclass is
an apparatus wherein polymerization 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 polymerizable 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 polymerization reaction zones.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein polymerization 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 polymerization reactors which are interconnected at some point.
(1) Note. For the most part patents herein relate to advancement of polymerizing materials from one zone to another so as to effect a progressive degree of polymerization and which are usually advanced until the degree of polymerization is brought to the desired state.

This subclass is indented under subclass 65. Subject matter wherein material (e.g., monomer, catalyst, etc.) is added to a zone containing polymerizable material therein, said polymerizable material being in a state undergoing active polymerization and wherein said material is added in a sequential or incremental manner.
(1) Note. "Sequential or incremental" addition requires (1) the addition of material involving a halting, interruption, or pausing in the addition of the same material followed by a resumption of addition; or (2) the addition of materials to a polymerization zone followed by the addition of materials distinct from the previous material, or (3) the addition of disproportionate amounts of materials so that the addition of one is completed prior to the completion of the addition of the other material.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein a portion of material is removed from a zone wherein material is undergoing polymerization 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 an active polymerization is occurring.

This subclass is indented under subclass 67. Subject matter wherein monomer is removed from and recycled back to an ongoing polymerization reaction zone.
(1) Note. The removal herein need only involve a monomer. For instance, removing material containing monomer admixed with diluent and the recycling of both would be proper herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:
69 for processes involving removing catalyst or catalyst component together with monomer and recycling of only the catalyst.
70 for processes involving removing monomer and diluent and recycling only the diluent.

This subclass is indented under subclass 67. Subject matter wherein a catalyst or catalyst constituent is removed from and recycled back to an ongoing polymerization zone.
(1) Note. The removal herein need not solely involve a catalyst or catalyst constituent. For instance, removing a catalyst admixed with a diluent and the recycling of both would be proper herein.

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70 for processes involving removing a catalyst or catalyst component and a diluent and the recycling of only the diluent.

This subclass is indented under subclass 67. Subject matter wherein a diluent or diluent component is removed from and recycled back to an ongoing polymerization zone.

This subclass is indented under subclass 1. Subject matter under Class 520, ... wherein only nonpolymerizable material is removed during the polymerization reaction.
(1) Note. Excluded from this subclass is the removal of polymerized materials admixed with nonpolymerized or nonpolymerizable material.

This subclass is indented under subclass 1. Subject matter under Class 520, ... involving polymers derived from ethylenically unsaturated monomers only and processes of polymerizing same; polymerizing compositions containing ethylenically unsaturated monomers only and processes of preparing polymerizable compositions.
(1) Note. This subclass provides for processes wherein an ethylenically unsaturated monomer is undergoing polymerization and concurrently therewith is reacting with a second ethylenic material, which second ethylenic material does not enter into the polymer backbone, e.g., polymerizing acrylic acid in the presence of allyl alcohol so that the final polymer is a polymerized acrylic acid having ester groups which are derived from the unsaturated alcohol.
(2) Note. The sole requirement for the products of this subclass is that the polymerization reaction involve only ethylenic unsaturated monomers. Note, however, that the actual polymerization mechanism need not involve the ethylenically unsaturated group (e.g., polymerization of a glycidyl methylacrylate may involve the double bond in one instance and in another instance may involve the ring opening of the epoxy group, etc.).
(3) Note. This subclass and its indents provide for
processes for adding material to an ongoing polymerization process or where preformed liquid polymers are further polymerized so as to form a final polymerized product.

SEE OR SEARCH CLASS:
525, Synthetic Resins or Natural Rubbers, subclasses 242+, for products resulting from or involving a polymer derived from only ethylenic monomers reacted with an ethylenically unsaturated reactant, or for products resulting from or involving a polymer derived from at least only ethylenic monomers reacted in the presence of an ethylenically unsaturated monomer. Subclasses 242+ also provides for the processes of preparing products properly classifiable within the subclass.
528, Synthetic Resins or Natural Rubbers, 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 materials other than the ethylenic polymer. Subclasses 480+ also provide for the processes of admixing with a broadly claimed nonreactant material.

This subclass is indented under subclass 72. Subject matter wherein the polymerization reaction is effected using at least two different pressures or at least two different temperatures.
(1) Note. The temperature or pressure must be increased or decreased under controlled conditions so that the temperature or pressure is maintained for a definite period of time prior to the raising or lowering of the temperature or pressure.
(2) Note. The mere recitation of a range of temperatures or pressures is not considered sufficient to be considered as being different temperatures or pressures.

This subclass is indented under subclass 72. Subject matter wherein material that would normally form during a polymerization reaction and which would clog or foul the polymerization equipment is removed from or is prevented or inhibited from forming by the use of a nonpolymerizable material, which material is other than a hydrocarbon or halogenated hydrocarbon used in solvent or diluent amount.
(1) Note. Included herein but not limited to the specific examples are patents which specifically claim the use of materials to remove or inhibit forming of fouling materials by solvents, surfactant surface treatments during polymerization, or maintaining a fluid film between the polymerization equipment and the polymerizing materials.

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62 for a process of polymerizing in reactor or defined material or in reactor which has been treated prior to polymerization therein.
subclasses 89+ for processes of polymerizing in a specific diluent or solvent wherein reaction buildup is alleviated by the inherent use of a solvating material; and for processes of polymerizing in a hydrocarbon or halogenated hydrocarbon diluent together with a specific material wherein the hydrocarbon or halogenated hydrocarbon may prevent fouling of the reactor.
239 through 352.2, appropriate product for processes of polymerizing in a hydrocarbon or chlorinated hydrocarbon diluent or solvent.

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528, Synthetic Resins or Natural Rubbers, subclass 484, for processes of removing buildup on reactor or processing equipment subsequent to polymerization.

This subclass is indented under subclass 72. Subject matter which includes the chemical synthesis of a monomer or a prepolymer and subsequent polymerization thereof.
(1) Note. A prepolymer for purposes of the subclass is a low-molecular-weight-polymeric material prepared from a single source product and which is regarded as an intermediate reactant rather than as a final product and which is further polymerizable by a continuation of the same reaction as used in preparing said prepolymer.
(2) Note. Included herein are processes involving dimerization or trimerization of monomer.

SEE OR SEARCH CLASS:
260, Chemistry of Carbon Compounds, and its daughter classes,
for a method of preparing a polymerizable monomer or prepolymer.

This subclass is indented under subclass 75. Subject matter wherein the monomer or prepolymer is derived from a petroleum fraction.
(1) Note. Included herein are processes of recovering hydrocarbon materials from a crude-natural source followed by a chemical reaction (e.g., dimerization, etc.) and subsequent final polymerization.

This subclass is indented under subclass 72. Subject matter which includes the step of purifying the ethylenic monomer.
(1) Note. Purification for this subclass may be for any number of reasons (e.g., removing impurities which inhibit polymerization, removing impurities which may be undesirable in the final polymer, etc.).
(2) Note. Included in this subclass are processes involving physical treatments (e.g., distillation, sorbent extraction, etc.) as well a processes involving chemical interaction of the impurity or undesired constituents.

SEE OR SEARCH THIS CLASS, SUBCLASS:
75 for processes of chemically modifying a monomer or prepolymer.

SEE OR SEARCH CLASS:
528, Synthetic Resins or Natural Rubbers, subclasses 480+, for processes of purifying a polymer by either a chemical or physical process.

This subclass is indented under subclass 72. Subject matter wherein material which is added to a zone, said zone containing material therein which is undergoing
polymerization, and the addition of the material is other than by the continuous addition of the material contained in the initial change.
(1) Note. For purposes herein, addition proper for this subclass involves any of the following (1) the addition of material to a polymerization zone and continuing the polymerization without any subsequent addition, or (2) the addition of materials to a polymerization zone followed by the addition of materials distinct from the previous material either in whole-amount or in the addition of the same material in different concentration, or (3) the addition of material to terminate polymerization, or (4) the addition of material with the addition involving a halting, interruption, pausing, or suspending of adding material at any time during the polymerization reaction or (5) the addition of a material to a zone wherein all of the other necessary materials are present except the one being added.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 72+ for a method of polymerization involving the continuous addition of material to a zone.

This subclass is indented under subclass 78. Subject matter wherein the material is added in an incremental or sequential manner.
(1) Note. "Sequential or incremental" addition requires (1) the addition of material involving a halting interruption, or pausing in the addition of the same material followed by a resumption of addition; or (2) the addition of materials to a polymerization zone followed by the addition of material distinct from the previous materials; or (3) the addition of disproportionate amounts of material so that the addition of one is completed prior to the completion of the addition of the other material.

This subclass is indented under subclass 79. Subject matter wherein the polymerization reaction is effected in the presence of water.

This subclass is indented under subclass 80. Subject matter wherein the added material is devoid of monomer.

This subclass is indented under subclass 78. Subject matter wherein the added material terminates or retards the polymerization reaction (e.g., polymerization inhibitor, terminator, chain-transfer agent, short-stopper, etc.).

This subclass is indented under subclass 82. Subject matter wherein the added terminating or inhibiting material contains a nitrogen-containing compound.

This subclass is indented under subclass 82. Subject matter wherein the added terminating or retarding material contains an oxygen-containing compound.
(1) Note. This subclass includes the use of water, per se, as a retarding or terminating agent.

This subclass is indented under subclass 82. Subject matter wherein the added terminating or retarding material contains a sulfur atom.

This subclass is indented under subclass 78. Subject matter wherein the added material is the catalyst or a part of the catalyst system.

This subclass is indented under subclass 78. Subject matter wherein the added material is an ethylenically unsaturated monomer.

This subclass is indented under subclass 72. Subject matter wherein the polymerization process involves specific mixing, stirring, agitating, or the movement of material.
(1) Note. Specified for purposes of this subclass requires the naming of a movement-imparting rotor, stirrer, impeller or any other device in terms of its specified dimension, design, size, or shape thereof, or requires the recitation of a reactor of a design to facilitate movement or agitation; or requires a positive recitation in the claims as to velocity or designated time of mixing, said time being either continuous or intermittent.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 72+ for mere agitating during a polymerization reaction.

This subclass is indented under subclass 72. Subject matter wherein an ethylenically unsaturated monomer is polymerized in the presence of a specified material.

SEE OR SEARCH CLASS:
520, Synthetic Resins or Natural Rubbers, Glossary, for a definition of the term "specified material".

This subclass is indented under subclass 89. Subject matter wherein the specified material contains at least one transition metal atom.
(1) Note. "Transition metal" for purposes of this subclass is limited to elements of atomic numbers 21-29, 39-47, 57-79, and 89 and higher and does not include Zn, Cd, and Hg. "Nontransition metal" as used throughout this schedule is intended to include all metals other than the transition metals.
(2) Note.
(a) Nontransition metal atom-to-carbon bond as used throughout this schedule includes all compounds that contain at least one carbon atom bonded to at least one nontransition metal atom.
(b) Nontransition metal hydride as used through this schedule includes all compounds that contain at least one hydrogen atom bonded to at least one nontransition metal.
(c) Included within the scope of compounds encompassed by the definition of 2(a) and 2(b) above are those compounds having two or more nontransition metal atoms wherein additionally one of said atoms is bonded to a carbon or hydrogen atom and wherein one of said nontransition metal atoms is not bonded to a hydrogen or carbon atom.
(3) Note.
(a) Metal borohydrides (e.g., LiBH[subscrpt]4[end subscrpt], Ti(BH[subscrpt]4[end subscrpt])[subscrpt]3[end subscrpt], etc.) are classified as if they are hydrides of boron and of the metal atom.
(b) Mixed metal hydrides (e.g., NaA1H[subscrpt]4[end subscrpt], (CaALH[subscrpt]4[end subscrpt])[subscrpt]2[end subscrpt], etc.) are classified as if they are hydrides of aluminum and of the other metal.
(c) In those instances where a carbon atom has replaced at least one or more hydrogen atoms of compounds as elaborated in 3(a) above, then classification is made as if these compounds are alternatively bonded to a boron atom and to a metal, and in those cases wherein a carbon atom has replaced at least one or more hydrogen atoms of compounds as elaborated in 3(b) above, then classification is made as if these compounds are alternatively bonded to either one of the metal atoms.

SEE OR SEARCH THIS CLASS, SUBCLASS:
132 for a mixture of LiBH[subscrpt]4[end subscrpt] and Ti Cl[subscrpt]4[end subscrpt].
159 for a mixture of NaAl H[subscrpt]4[end subscrpt] and Ti Cl[subscrpt]4[end subscrpt].

This subclass is indented under subclass 90. Subject matter wherein transition material is in contact with water during the polymerization reaction.
(1) Note. The amount of water present during the polymerization reaction is of no significance (e.g., diluent, catalyst, activator, etc)..
(2) Note. Water of hydration, per se, is not considered as being water for this subclass.
(3) Note. The use of a catalyst system or other material which has been prepared in the presence of water is not proper for this subclass unless it is understood that free water remains after the material has been formed.

This subclass is indented under subclass 91. Subject matter wherein the transition metal atom is bonded to at least one carbon atom; or wherein the transition metal material is in admixture with a compound that contains at least one metal atom bonded to a carbon atom.

This subclass is indented under subclass 91. Subject matter wherein at least one atom is a Group VIII metal (i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt).

This subclass is indented under subclass 93. Subject matter wherein (1) the transition metal atom exists as a part of a sulfur-containing organic compound; or (2) the transition metal material is in admixture with an organic sulfur-containing compound.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition metal atom as part of a binary compound solely composed of a single transition metal and oxygen.
(1) Note. Included herein are supports for active ingredients wherein the support may be an oxide of a transition metal (e.g., thoria, titania, etc.).
(2) Note. Excluded from this subclass are the peroxides of a transition metal.
(3) Note. This subclass includes reaction products or reaction mixtures of transition metal oxides wherein the surface of the transition metal oxide may be modified (e.g., TiO[subscrpt]2[end subscrpt] chemically bonded to TiCl[subscrpt]4[end subscrpt] on its surface) but wherein the material is still regarded as being in oxide form.

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172 for a binary peroxide containing a transition metal and oxygen.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains at least two transition metal atoms, one of said transitional metal atoms being in elemental form or as part of a nonbinary oxide compound.

This subclass is indented under subclass 96. Subject matter wherein the specified material contains a nontransition metal in elemental form, or in the form of a hydride, or as a
compound wherein the nontransition metal is bonded directly to a carbon atom.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains elemental halogen or a nonmetal halogen-containing compound.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains at least one aluminum compound having an aluminum atom bonded to halogen, and wherein said same aluminum atom is not bonded to a carbon or hydrogen atom.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains at least one nonmetallic, organic, nitrogen, oxygen, sulfur or phosphorus-containing compound.

This subclass is indented under subclass 95. Subject matter wherein the specified material consists of at least two transition metal oxides, at least two of said transition metal oxides being other than oxides of Ti, Zr, Hf, or Th.
(1) Note. Proper for this subclass are ternary systems containing three transitional metal oxides wherein one of the oxides is of Ti, Zr, Hf or Th and wherein the other two oxides are not of those transition metals.

SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for a mixture of a Group VIII oxide and an oxide of Ti, Zr, Hf, or Th.
104 for a mixture of a Group VIB oxide and/or oxide of Ti, Zr, Hf, or Th.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains an elemental nontransitional heavy metal or a compound of a nontransition heavy metal.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains an oxide of a Group VIII metal, i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains an oxide of a Group VIB metal, i.e., Cr, Mo, W.

This subclass is indented under subclass 104. Subject matter wherein the specified material contains an elemental nonheavy metal, or contains a hydride of a nonheavy metal, or contains a compound having a nonheavy metal to carbon bond.

This subclass is indented under subclass 104. Subject matter wherein the specified material contains an oxide of chromium.

This subclass is indented under subclass 95. Subject matter wherein the specified material contains an oxide of a Group IVB metal, i.e., Ti, Zr, Hf.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition metal in elemental form.
(1) Note. Included within the term elemental metal are alloys.

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62 for processes of polymerizing in a reactor wherein one of the reactor surfaces which contacts the polymerizing material is a transition metal in elemental form.

This subclass is indented under subclass 108. Subject matter wherein the specified material contains an elemental transition metal in admixture with a compound that contains an -O-O-group.

This subclass is indented under subclass 108. Subject matter wherein the specified material contains an elemental transition metal which is in admixture with a nontransition metal, or is in admixture with a hydride of a nontransition metal, or is in admixture with a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 110. Subject matter wherein the specified material contains at least one nonmetallic material which contains a nitrogen, oxygen, sulfur or phosphorus atom.
(1) Note. Excluded from this area is the use of nitrogen or air as merely carrier or blanket gases.

This subclass is indented under subclass 108. Subject matter wherein the specified material contains an elemental transition metal which is in admixture with a transition metal compound.

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108 for an admixture of two or more elemental transition metal atoms, e.g., alloys, etc.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains (1) two compounds having diverse transition metal atoms; or (2) a single compound having at least two diverse transition metal atoms therein, e.g.,

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 118+ for a specified material containing two or more compounds of the same transition metal. [figure]

This subclass is indented under subclass 113. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 114. Subject matter wherein at least one of the transition atoms present is a Group VIII element, i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt.

This subclass is indented under subclass 114. Subject matter wherein at least one of the transition metal atoms present is a Group IVB atom and wherein at least one of the different transition metal atoms present is a Group VB atom (e.g., TiCl[subscrpt]4[end subscrpt] and VOCL[subscrpt]3[end subscrpt], etc.).
(1) Note. A Group IV atom is Ti, Zr, Hf. A Group VB atom is V, Nb, Ta.

This subclass is indented under subclass 113. Subject matter wherein at least one of the transition metal atoms present is a Group VIII element, i.e., Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains at least two different transition metal compounds, each of said compounds containing the same transition metal atom.
(1) Note. Excluded from this subclass are compositions containing two or more distinct compounds of the same transition elements when such compositions are the result of a reaction wherein a part of the original transition metal compound is converted to a different compound form (e.g., partial reduction of TiCl[subscrpt]4[end subscrpt] with AlR[subscrpt]3[end subscrpt]) to form a mixture of TiCl[subscrpt]4[end subscrpt] and TiC[subscrpt]l3[end
subscrpt], etc. However, a patent claim wherein TiCl4 and TiCl[subscrpt]3[end subscrpt] are separately added would be proper herein.

This subclass is indented under subclass 118. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 90. Subject matter wherein (1) the specified material contains a transition metal compound which is in admixture with a compound containing a heavy metal atom and which heavy metal is other than a heavy metal atom directly bonded to a carbon atom or to a hydrogen atom; or (2) wherein a transition metal containing compound additionally contains at least one heavy metal atom in the same molecule, which heavy metal atom is not directly bonded to a hydrogen or carbon atom (e.g., mercuric tungstate, or a mixture of NiCl[subscrpt]2[end subscrpt] and ZnCl[subscrpt]2[end subscrpt], etc.).

This subclass is indented under subclass 120. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom.
(1) Note. Included in this subclass are compounds which may contain two heavy metal atoms and wherein one of the metal atoms may be attached to a carbon or hydrogen atom and wherein the other heavy metal atom is not attached to a hydrogen or carbon atom.

This subclass is indented under subclass 121. Subject matter wherein the heavy metal compound contains a halogen atom (e.g., SnCl[subscrpt]4[end subscrpt], (R-O)[subscrpt]3[end subscrpt]SnCl, etc.).

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition metal compound which is in admixture with a Group IA or IIA metal compound, which compound is other than a Group IA or Group IIA metal hydride or compound containing a Group IA or Group IIA metal atom bonded directly to a carbon atom; or wherein a transition metal-containing compound additionally contains at least one Group IA or Group IIA metal atom in the same molecule, which Group IA or Group IIA metal atom is not bonded directly to a hydrogen or carbon atom (e.g., Ca(NR[subscrpt]2[end subscrpt])[subscrpt]2[end subscrpt], NaNH[subscrpt]2[end subscrpt], etc.).
(1) Note. Included in this subclass are compounds which may contain two alkali metal atoms and wherein one of the alkali metal atoms may be attached to a carbon or hydrogen atom and wherein the other alkali metal atom is not attached to a carbon or hydrogen atom (e.g., NaCH[subscrpt]2[end subscrpt]CH[subscrpt]2[end subscrpt]ONa, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:
167 for a specified material containing a transition metal compound and an elemental Group IA or Group IIA metal atom.

This subclass is indented under subclass 123.1. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein the nontransition metal is directly bonded to a carbon atom.
(1) Note. Examples of substances provided for herein as contained in the specified material are lithium metal, MgH[subscrpt]2[end subscrpt], Al(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt], and C[subscrpt]2[end subscrpt]H[subscrpt]5[end
subscrpt]MgCl.

This subclass is indented under subclass 124.1. Subject matter wherein the specified material contains a magnesium compound having no carbon to magnesium or hydrogen to magnesium bonds.
(1) Note. Examples of substances provided for herein as contained in the specified material are MgCl[subscrpt]2[end subscrpt], MgO, and Mg(OC[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]2[end subscrpt].

SEE OR SEARCH THIS CLASS, SUBCLASS:
941 for a cross-reference art collection pertaining to the subject matter of this subclass and its indents.

This subclass is indented under subclass 124.2. Subject matter wherein an additional specified material is present (i.e., there are four or more specified materials present).
(1) Note. This subclass provides, inter alia, for the combination of TiCl[subscrpt]4[end subscrpt], MgCl[subscrpt]2[end subscrpt], Al(CH[subscrpt]3[end subscrpt])[subscrpt]3[end subscrpt] and an additional specified material such as Al(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt], PCl[subscrpt]3[end subscrpt] or alcohol.
(2) Note. Material such as Mg[subscrpt]m [end subscrpt]Ti(OR) [subscrpt]m[end subscrpt]X[subscrpt]p[end subscrpt]{ED}[subscrpt]q[end subscrpt] wherein R is hydrocarbon, X is halogen and ED is a specified material such as a carboxylic acid ester will be considered to represent a mixture of specified materials rather than a unitary compound. In this particular mixture, ED represents the additional specified material which satisfies the requirement of this subclass.
(3) Note. For purpose of this and indented subclasses, materials such as MgCl[subscrpt]2 deg.[end subscrpt]2H[subscrpt]2[end subscrpt]O are generally regarded as constituting two specified materials (i.e., MgCl[subscrpt]2[end subscrpt] and H[subscrpt]2[end
subscrpt]O). See Search This Class, Subclass, infra.

SEE OR SEARCH THIS CLASS, SUBCLASS:
124.4 for MgCLI[subscrpt]2[end subscrpt].2H[subscrpt]2[end subscrpt]O considered as a single specified material.

SEE OR SEARCH CLASS:
520, Synthetic Resins or Natural Rubbers, Glossary, for a definition of the term "specified material".

This subclass is indented under subclass 124.3. Subject matter wherein there is present (1) two different magnesium compounds neither of which contains a carbon to magnesium or a hydrogen to magnesium bond, or (2) a Group IA metal or nonmagnesium Group IIA metal compound, neither of which contains a bond between carbon or hydrogen and the Group IA or Group IIA metal.
(1) Note. An example of (1), supra, is the combination of MgCl[subscrpt]2[end subscrpt] and Mg(OC[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]2[end subscrpt]. An example of (2), supra, is MgCl[subscrpt]2[end subscrpt] KCl 6H[subscrpt]2[end subscrpt]O.

This subclass is indented under subclass 124.3. Subject matter wherein the additional specified material is an inorganic compound that contains oxygen and silicon or oxygen and aluminum.
(1) Note. Examples of additional specified materials provided for herein are SiO[subscrpt]2[end subscrpt], Al[subscrpt]2[end subscrpt]O[subscrpt]3[end subscrpt], and H[subscrpt]3[end subscrpt]Si-O-SiH[subscrpt]3[end subscrpt].

This subclass is indented under subclass 124.5. Subject matter wherein an organic material that contains boron, silicon, nitrogen, phosphorus or chalcogen is present and
does not contain metal.
(1) Note. Examples of material provided for herein are B(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt], ethyl acetate, CH[subscrpt]3[end subscrpt]SiHCl[subscrpt]2[end subscrpt], etc.
(2) Note. Chalcogen is defined as oxygen, sulfur, selenium, or tellurium.

This subclass is indented under subclass 124.3. Subject matter wherein there are present plural nontransition elemental metals, hydrides thereof, or compounds of a nontransition metal wherein the nontransition metal is bonded directly to a carbon atom or to a hydrogen atom, or mixtures thereof.
(1) Note. Examples of combinations provided for herein are: (1) lithium metal and Al(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt], (2) MgH[subscrpt]2[end subscrpt] and C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt]MgCl, (3) Mg(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]2[end subscrpt] and Mg(CH[subscrpt]3[end subscrpt])[subscrpt]2[end subscrpt], (4) lithium metal and calcium metal.

This subclass is indented under subclass 124.7. Subject matter wherein an organic material that contains boron, silicon, nitrogen, phosphorus or chalcogen is present and does not contain metal.
(1) Note. Chalcogen is defined as oxygen, sulfur, selenium, or tellurium.

This subclass is indented under subclass 124.3. Subject matter wherein the additional specified material is an organic material that contains boron, silicon, nitrogen,
phosphorus or chalcogen and does not contain metal.
(1) Note. Chalcogen is defined as oxygen, sulfur, selenium, or tellurium.

This subclass is indented under subclass 124.9. Subject matter wherein an organic aluminum compound which is devoid of any bonds between the aluminum and carbon or hydrogen atoms is present.
(1) Note. Examples of compounds provided for herein are Al(OC[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt] and Al{N(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]2[end subscrpt]}[subscrpt]2[end subscrpt]Cl.

This subclass is indented under subclass 124.9. Subject matter wherein a compound which contains only (1) carbon, hydrogen and halogen atoms, or (2) carbon and halogen atoms is present.
(1) Note. Examples of compounds provided for herein are CCl[subscrpt]4[end subscrpt] and CHCl[subscrpt]3[end subscrpt].

This subclass is indented under subclass 124.9. Subject matter wherein an organic material which contains boron or silicon but does not contain metal is present.
(1) Note. Examples of materials provided for herein are B(OC[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt], Si(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]4[end subscrpt], and Si(CH[subscrpt]3[end subscrpt])Cl[subscrpt]3[end subscrpt].

This subclass is indented under subclass 124.9. Subject matter wherein an inorganic material having no bonds between hydrogen and metal is present.
(1) Note. Examples of materials provided for herein are HSiCl[subscrpt]3[end subscrpt], MgCl[subscrpt]2[end subscrpt] H[subscrpt]2[end subscrpt]O and BCl[subscrpt]3[end subscrpt].

This subclass is indented under subclass 125.4. Subject matter wherein the inorganic material is an aluminum halide.

This subclass is indented under subclass 124.9. Subject matter wherein there are at least two different organic materials present, each contains nitrogen, phosphorus or chalcogen and does not contain metal.
(1) Note. Examples of combinations of materials provided for herein are (1) P(OC[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt] and C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt]OH, and (2) CH[subscrpt]3[end subscrpt]OH and C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt]OH.
(2) Note. Chalcogen is defined as oxygen, sulfur, selenium, or tellurium.

This subclass is indented under subclass 124.3. Subject matter wherein the additional specified material is a compound which contains only (1) carbon, hydrogen and halogen atoms, or (2) carbon and halogen atoms.
(1) Note. Examples of compounds provided for herein are CCl[subscrpt]4[end subscrpt] and CHCl[subscrpt]3[end subscrpt].

This subclass is indented under subclass 124.3. Subject matter wherein the additional specified material is an inorganic material having no bonds between hydrogen and metal.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition metal compound which is in admixture with a silicon-containing material, or wherein the transition metal compound additionally contains at least one silicon atom therein.
(1) Note. Included herein are those processes that claim the use of silica.

This subclass is indented under subclass 126. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 127. Subject matter wherein the silicon-containing material is a nonmetallic organic compound.

This subclass is indented under subclass 127. Subject matter wherein the silicon-containing material is an inorganic
oxygen-containing compound, e.g., H[subscrpt]3[end subscrpt]Si-O-SiH[subscrpt]3[end subscrpt], etc.

This subclass is indented under subclass 126. Subject matter wherein a the silicon-containing material is an inorganic oxygen-containing compound, e.g., SiO[subscrpt]2[end subscrpt], H[subscrpt]3[end subscrpt]Si-O-SiH[subscrpt]3[end subscrpt], etc.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition-metal compound which is in admixture with a boron-containing material, or wherein the transition-metal compound, additionally, contains at least one boron atom therein.

This subclass is indented under subclass 131. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom, e.g., transition-metal compound and LiBH[subscrpt]4[end subscrpt], etc.

This subclass is indented under subclass 132. Subject matter wherein the boron compound contains at least one halogen atom, e.g., B[subscrpt]3[end subscrpt]N[subscrpt]3[end subscrpt]H[subscrpt]3[end subscrpt]Cl[subscrpt]3[end subscrpt] (trichloroborazole), etc.

This subclass is indented under subclass 131. Subject matter wherein the boron compound contains a boron to hydrogen bond, or a boron to carbon bond (e.g., Ti(BH[subscrpt]4[end subscrpt])[subscrpt]3[end subscrpt], TiCl[subscrpt]4[end subscrpt] and B(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]3[end subscrpt], etc.).

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition metal compound in admixture with at least one nonmetal-containing material having at least one atom of nitrogen, phosphorus, oxygen, sulfur, selenium, tellurium, or halogen.
(1) Note. Nitrogen gas, per se, is not a basis for classification herein. Such claims are classified elsewhere on some other basis.
(2) Note. Patents which disclose air but do not specifically claim air as a needed component of the composition are excluded herefrom and will be classified elsewhere on some other basis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
91 for a process of polymerizing in the presence of water and a transition metal or transition metal compound.

This subclass is indented under subclass 135. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein a nontransition metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is elemental halogen or is a nonmetallic-inorganic-halogen-containing compound.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is elemental oxygen or is a nonmetallic inorganic-oxygen-containing compound.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is an organic compound containing at least one phosphorus atom.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is an organic compound containing at least one sulfur atom.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is an organic compound containing at least one nitrogen atom.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is an organic compound containing at least one oxygen atom.

This subclass is indented under subclass 142. Subject matter wherein the nonmetal oxygen compound contains at least a halogen atom in the same molecule as the oxygen atom.

This subclass is indented under subclass 136. Subject matter wherein the nonmetal material is an organic compound containing at least one halogen atom.

This subclass is indented under subclass 135. Subject matter wherein the nonmetal material is elemental phosphorus or is a phosphorus-containing compound.

This subclass is indented under subclass 135. Subject matter wherein the nonmetal material is elemental sulfur or is a sulfur-containing compound.

This subclass is indented under subclass 135. Subject matter wherein the nonmetal material is a nitrogen-containing compound.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a transition metal compound (1) in admixture with two or more diverse elemental nontransition metals; or (2) in admixture with at least two different nontransition metal hydride compounds; or (3) in admixture with at least two different nontransition metals to carbon-bonded compounds; or (4) in admixture with a
nontransition elemental metal and a nontransition metal hydride compound or a nontransition metal-to-carbon-bonded compound; or (5) is in admixture witha nontransition metal hydride compoundand a nontransition metal-to-carbon-bonded compound.
(1) Note. Different for purposes herein regards to the compounds of a nontransition metal bonded to hydrogen or carbon is meant to include the same nontransition metal existing in different compounds, e.g., one being the hydride and the other containing a nontransition metal to carbon bonds, or even two different compounds of the same nontransition metal each bonded to carbon, but in different compounds, or in different hydride forms.

This subclass is indented under subclass 148. Subject matter wherein the specified material contains an atom of a Group VA (As, Sb, Bi)metal in elemental form, or contains a hydride of a Group VA metal, or contains a compound of a Group VA metal wherein the Group VA metal is directly bonded to a carbon atom.

This subclass is indented under subclass 148. Subject matter wherein the specified material contains an atom of a Group IVA (Ge, Sn, Pb)metal in elemental form, or contains a hydride of a Group IV metal, or contains a compound of a Group IVA metal wherein the Group IVA metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 148. Subject matter wherein the specified material contains an atom of a Group IIIA (Al, Ga, In, Tl) metal in elemental form, or contains a hydride of a Group IIIA metal, or contains a compound of a Group IIIA metal wherein the Group IIIA metal is directly bonded to a carbon atom.

This subclass is indented under subclass 151. Subject matter wherein in addition to the Group IIIA material the specified material contains at least one Group IA element in elemental form, or contains a hydride of a Group IA metal, or contains a compound of a Group IA metal wherein the Group IA metal is directly bonded to a carbon atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
123.1 for a compound of a Group IA element wherein the Group IA element is not bonded to any hydrogen or carbon atoms.

This subclass is indented under subclass 151. Subject matter wherein the specified material contains (1) two or more Group IIIA metals in elemental form, two or more Group IIIA metal hydrides, or two or more compounds which contain a carbon to Group IIIA metal bond; or (2) a mixture composed of at least two of any of the Group IIIA materials noted in (1).

This subclass is indented under subclass 90. Subject matter wherein (1) the specific material contains a transition metal compound which is in admixture with a compound of aluminum, which aluminium compound is other than the hydride or other than a compound wherein an aluminum atom is directly bonded to a carbon atom, or (2) wherein a transition metal-containing compound additionally contains at least one aluminum atom in the same molecule, which aluminum atom is not directly bonded to a hydrogen or carbon atom.

This subclass is indented under subclass 154. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein the nontransition metal atom is directly bonded to a carbon atom.

This subclass is indented under subclass 155. Subject matter wherein the specified material contains an inorganic oxygen-containing compound of aluminum.

This subclass is indented under subclass 155. Subject matter wherein the specified material contains aluminum trihalide.

This subclass is indented under subclass 157. Subject matter wherein the transition metal compound contains at least one atom of a Group IVA metal (i.e., Ti, Zr, Hf).

This subclass is indented under subclass 90. Subject matter wherein the specified material contains a nontransition metal in elemental form, or contains a hydride of a nontransition metal, or contains a compound of a nontransition metal wherein the nontransition metal atom is directly bonded to a carbon atom (e.g., TiCl[subscrpt]4[end subscrpt] and LiAlH[subscrpt]4[end subscrpt], etc.).

This subclass is indented under subclass 159. Subject matter wherein a transition metal atom is bonded to a carbon atom (e.g., Ti(CR[subscrpt]3[end subscrpt])[subscrpt]3[end subscrpt], tetra lithium ferrocenyl, etc.).

This subclass is indented under subclass 159. Subject matter wherein a transition metal compound contains at least one atom of phosphorus, sulfur, or nitrogen, in the same molecule as the transition metal atom (e.g., titanium nitride, MoS[subscrpt]2[end subscrpt], ferric hydrosulfate, etc.).

This subclass is indented under subclass 159. Subject matter wherein at least one carbon atom is directly bonded to a nontransition metal atom and the molecule contains in addition at least one ethylenic unsaturated moiety.

SEE OR SEARCH CLASS:
520, Synthetic Resins or Natural Rubbers, Glossary, for the definition of "ethylenically unsaturated".

This subclass is indented under subclass 159. Subject matter wherein at least one nontransition metal is bonded to a hydrogen or carbon atom and the same molecule contains in addition at least one atom of phosphorus, nitrogen or sulfur; e.g., AlH[subscrpt]3[end subscrpt].N(CH[subscrpt]3[end subscrpt])[subscrpt]3[end subscrpt], H[subscrpt]2[end subscrpt]Al.N(CH[subscrpt]3[end subscrpt])[subscrpt]2[end subscrpt].

This subclass is indented under subclass 159. Subject matter wherein the transition metal of the transition metal compound is a Group IB, IIIB, or VIIB atom, or has an atomic number of 58-71, or 90 and higher.

This subclass is indented under subclass 159. Subject matter wherein a nontransition metal compound which has at least one nontransition metal to carbon contains (1) at least two atoms of the same nontransition metal; or (2) at least two diverse nontransition atoms, (e.g., Sb(C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]4[end subscrpt]ClAl[subscrpt]2[end subscrpt](C[subscrpt]2[end subscrpt]H[subscrpt]5[end subscrpt])[subscrpt]6[end subscrpt], LiAlR[subscrpt]4[end subscrpt], etc.).
(1) Note. Included herein are those compounds that contains a repeat unit (e.g., (CH[subscrpt]2[end subscrpt]AlR)[subscrpt]n[end subscrpt], etc.).

This subclass is indented under subclass 159. Subject matter wherein a group IVA or Group VA metal atom is directly bonded to an atom of hydrogen or carbon.

This subclass is indented under subclass 159. Subject matter wherein the nontransition metal atom exists in elemental form.

This subclass is indented under subclass 159. Subject matter wherein in addition to the nontransition metal compound there is also present elemental carbon.

This subclass is indented under subclass 159. Subject matter wherein the transition metal compound contains a Group VB, VIB, or VIII metal atom.

Transition metal is Group VIII:
This subclass is indented under subclass 169. Subject matter wherein the transition metal compound contains a Group VIII metal atom.

Transition metal is vanadium:
This subclass is indented under subclass 169. Subject matter wherein the transition metal compound contains a vanadium atom.

At least one monomer is nonhydrocarbon material:
This subclass is indented under subclass 159. Subject matter wherein at least one monomer is other than a hydrocarbon.
(1) Note. This subclass includes the interpolymerized product of a hydrocarbon monomer and a nonhydrocarbon monomer as well as homopolymeric products of nonhydrocarbon monomers.

This subclass is indented under subclass 90. Subject matter wherein the specified material contains at least one transition metal atom bonded to a carbon atom.

This subclass is indented under subclass 170. Subject matter wherein the transition metal is a Group VIII metal.

This subclass is indented under subclass 90. Subject matter
wherein the transition metal compound contains at least one atom of phosphorus, sulfur, nitrogen, or oxygen chemically combined therewith.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains an elemental alkali metal, and alkali metal hydride, or a compound containing an alkali metal bonded to a carbon atom.
(1) Note. Alkali metal is limited to the elements of Group IA and as such is limited to Li, Na, K, Rb, Cs, and Fr.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 90+ for processes of polymerizing in the presence of a transition metal atom and a Group IA element or compound thereof.
176 through 182, which may include compounds wherein the alkali metal is bonded to a carbon or hydrogen atom and in the same molecule there is also present at least one of the necessary elements required under the definitions of these subclasses.

This subclass is indented under subclass 173. Subject matter wherein the specified material contains two or more different alkali metals in elemental or compound form and at least one of the alkali metals is a free alkali metal, alkali metal hydride, or a compound containing an alkali metal atom bonded to a carbon atom.
(1) Note. Included herein are compounds which contain two diverse alkali metals in a single compound or alloy.

This subclass is indented under subclass 173. Subject matter wherein the specified material contains (1) an elemental alkali metal admixed with a compound of the same alkali
metal; or (2) wherein an alkali metal hydride or compound containing an alkali metal-to-carbon bond is admixed with another compound of the same alkali metal (e.g., Na and sodium t-dodecyl mercaptide, or butyl lithium, and LiH, etc.).

This subclass is indented under subclass 173. Subject matter wherein the specified material contains a heavy metal atom.

This subclass is indented under subclass 173. Subject matter wherein the specified material contains aluminum (e.g., LiAlH[subscrpt]4[end subscrpt], etc.).

This subclass is indented under subclass 173. Subject matter wherein the specified material contains boron or silicon (e.g., LiBH[subscrpt]4[end subscrpt]. etc.).

This subclass is indented under subclass 173. Subject matter wherein the specified material contains phosphorus.

This subclass is indented under subclass 173. Subject matter wherein the specified material contains a nitrogen-containing compound.

This subclass is indented under subclass 173. Subject matter wherein the specified additive contains oxygen.
(1) Note. This subclass includes only specified compositions wherein there is a desired and intentional contact between air and the Group IA material and does include the use of air as a blanket or carrier gas.

This subclass is indented under subclass 173. Subject matter wherein the specified additive contains a halogen atom.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains a metal atom bonded to a carbon atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
192 for a polymerization process in the presence of a heavy metal-containing organic compound wherein the metal is not bonded to a carbon atom.

This subclass is indented under subclass 183. Subject matter wherein the carbon to metal bonded compound is in admixture with a compound that contains a -O-O- group or in admixture with free oxygen.
(1) Note. This subclass includes only specified compositions wherein there is a desired and intentional contact between air and the compound having a carbon atom bonded to a metal atom and does not include the use of air as a blanket or carrier gas.

This subclass is indented under subclass 183. Subject matter wherein the specified material contains a compound wherein an atom of aluminum is bonded to a carbon atom.

This subclass is indented under subclass 185. Subject matter wherein the specified material contains at least one atom of aluminum not bonded to a carbon atom.

This subclass is indented under subclass 185. Subject matter wherein the specified material contains a Group IA or Group IIA metal atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 173+ for a specified material containing a Group IA metal atom in elemental form, Group IA hydride, or compound containing a Group IA metal bonded to a carbon atom.

This subclass is indented under subclass 185. Subject matter wherein the specified material contains a heavy metal atom.

This subclass is indented under subclass 185. Subject matter wherein the specified material contains phosphorus, nitrogen, sulfur, or oxygen.
(1) Note. Excluded from this area is the use of nitrogen or air as carrier or blanket gases.

This subclass is indented under subclass 183. Subject matter wherein the specified material contains a heavy metal atom bonded to a carbon atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:
188 for an admixture of an organoaluminum compound together with an organo heavy metal compound.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains a metal in elemental form.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 108+ for a specified material containing an elemental transition metal.
subclasses 173+ for an specified material containing an elemental Group IA metal.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains at least a heavy metal atom as part of an organic compound.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 90+ for a specified additive containing a transition metal atom.
176 for a specified additive containing a heavy metal atom and at least one atom of an elemental Group IA metal, hydride thereof, or carbon atom bonded to a Group IA metal atom.
183 for a process of polymerizing in the presence of a metal compound wherein a metal atom is directly bonded to a carbon atom of an organic radical.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains at least one atom of phosphorus in an organic compound.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains silicon, tellurium, selenium, or a Group VIIIA atom.
(1) Note. This subclass includes use of clays and diatomaceous earths as part of a specified material.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains a compound of boron which boron compound is other than (1) boron trihalide, per se; or (2) boron trihalide complexed with a nonmetal organic moiety.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 237+ for a polymerization process in the presence of boron trihalide, per se, or boron trihalide complexed with a nonmetal organic moiety, e.g., boron trihalide-etherate complex, etc.

This subclass is indented under subclass 195. Subject matter wherein the boron compound contains at least one boron atom
bonded to a carbon or hydrogen atom.

This subclass is indented under subclass 196. Processes wherein the boron compound is in admixture with free oxygen or with a compound that contains an -O-O- group.
(1) Note. This subclass includes only specified compositions wherein there is a desired and intentional contact between air and the boron compound and does not include the use of air as a blanket or carrier gas.

This subclass is indented under subclass 196. Subject matter wherein the boron compound contains at least one atom of phosphorus, sulfur, or nitrogen in the same molecule; or wherein the boron compound is in admixture with an elemental form of phosphorus or sulfur; or wherein the boron compound is in admixture with a compound form of phosphorus, sulfur, or nitrogen.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains a protein or a protein-reaction product, e.g., gelatin, silk, etc.
(1) Note. A protein reaction product requires at the minimum the presence of a peptide group, i.e., an amide group between the amino radical of one amino acid and the carboxyl radical of another amino acid.

SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for a polymerization process in the presence of a nitrogen-containing carboxylic acid, salt, ester, or anhydride thereof.

This subclass is indented under subclass 89. Processes wherein the specified material contains a carbohydrate or reaction product thereof, e.g., cellulose, starch, etc.
(1) Note. A carbohydrate "reaction product" requires that the basic carbohydrate skeleton not be destroyed.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains at least one distinct normally solid preformed polymer which has been derived from at least one ethylenically unsaturated material.
(1) Note. Polymers proper for this subclass must be either distinct from the polymers formed either in the nature or amounts of individual monomers therein, or in the manner in which they are formed.

SEE OR SEARCH THIS CLASS, SUBCLASS:
102 for a process of polymerizing in the presence of a transition metal-containing material and a preformed ethylenic polymer.
204 for a process of polymerizing in the presence of a melamine-formaldehyde reaction product.
208 for a process of polymerizing in the presence of a urea-formaldehyde reaction product.
subclasses 213+ for a process of polymerizing in the presence of a reaction product of a saturated carboxylic acid and a polyhydric alcohol.

SEE OR SEARCH CLASS:
525, Synthetic Resins or Natural Rubbers, subclasses 50+, for a process of polymerizing an ethylenically unsaturated monomer in the presence of a solid preformed polymer wherein the intent is to form a resinous composition containing the previously formed polymer or wherein the preformed polymer reacts with the ethylenic monomer to form a modified previously formed solid polymer.

This subclass is indented under subclass 201. Subject matter wherein the preformed normally solid polymer contains at least one free hydroxyl group or nonheavy metal salt thereof.
(1) Note. The preformed polymer intended primarily for this subclass, but not limited thereto, is of the type that has been formed by the hydrolysis or after-treatment of a preformed polyvinyl acetate polymer and is known generally as polyvinyl alcohol.

This subclass is indented under subclass 201. Subject matter wherein the preformed normally solid polymer is derived from at least one ethylenically unsaturated polycarboxylic acid.

SEE OR SEARCH CLASS:
520, Synthetic Resins or Natural Rubbers, Glossary, for a definition of the term "carboxylic acid or derivative" which discusses polycarboxylic acids.

This subclass is indented under subclass 89. Subject matter wherein the specified material contains a compound which has one or more carbon atoms covalently bonded in a closed ring with at least one atom of oxygen, sulfur, or nitrogen and which has no other atoms in the ring.

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194 for a compound having selenium or tellurium atoms in a heterocyclic ring.

This subclass is indented under subclass 204. Subject matter wherein the ring containing compound has at least one atom of sulfur and nitrogen in a single closed ring.

This subclass is indented under subclass 89. Subject matter wherein (1) the polymerization reaction is conducted in the presence of a halogenated hydrocarbon wherein at least one halogen atom is not chlorine or (2) wherein the polymerization is conducted in the presence of a halogenated hydrocarbon and water.
(1) Note. A halogenated hydrocarbon is a compound (1) solely composed of halogen and carbon atoms; or (2) of halogen, carbon, and hydrogen atoms.

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239 352.2, appropriate subclasses therein, for a process of polymerizing in the presence of a chlorinated hydrocarbon.

This subclass is indented under subclass 89. Subject matter wherein the specified additive contains water and a compound solely composed of carbon and hydrogen.

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239 352.2, appropriate subclasses therein, for a process of polymerizing in the presence of a hydrocarbon.

This subclass is indented under subclass 89. Subject matter wherein the specified additive is a ketone or aldehyde.
(1) Note. Included herein as being proper for this subclass are urea-formaldehyde reaction products.

SEE OR SEARCH CLASS:
520, Synthetic Resins or Natural Rubbers, Glossary, for a definition of the terms "aldehyde" and "ketone".

This subclass is indented under subclass 89. Subject matter wherein the polymerization reaction is conducted in the presence of at least one compound which contains at least one oxygen atom bonded to two discrete organic radicals and having the general formula, i.e., -C-O-C-.
(1) Note. This subclass includes ethers derived from phenols.
(2) Note. This subclass does not include nonmetallic ether complexes of a boron trihalide or of an aluminum trihalide.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 213+ for a polymerization process in the presence of a carboxylic acid, R -0H, OR e