| Class 521 | SYNTHETIC 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) |
![[List of Pre Grant Publications for class 521 subclass 25]](../as.gif) | ![[List of Patents for class 521 subclass 25]](../ps.gif) | 25 |  ION-EXCHANGE POLYMER OR PROCESS OF PREPARING |
| | 26 |  Process of regenerating |
| | 27 | Membrane or process of preparing |
| | 28 | Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymer |
| | 29 | Polymer characterized by defined size or shape other than bead or pearl |
| | 30 | Chemically treated solid polymer |
| | 31 |  Solid polymer derived from ethylenically unsaturated reactant only |
| | 34 | Solid polymer derived from at least one 1,2-epoxy containing reactant |
| | 35 | Solid polymer derived from aldehyde or derivative |
| | 38 | From ethylenically unsaturated reactant only |
| | 39 | From aldehyde or derivative |
| | 40 | PROCESS OF TREATING SCRAP OR WASTE PRODUCT CONTAINING SOLID ORGANIC POLYMER TO RECOVER A SOLID POLYMER THEREFROM |
| | 40.5 | Process of treating scrap or waste product containing at least one polymer derived from ethylenic unsaturated monomers only |
| | 41 | Treating rubber (or rubberlike materials) or polymer derived from a monomer having at least two ethylenic unsaturated moieties |
| | 41.5 |  Treating with organic phosphorus-containing material |
| | 42 | Treating with organic nitrogen-containing material |
| | 42.5 | Treating with organic chalcogen-containing material |
| | 43 |  Containing organic sulfur |
| | 43.5 | Containing carboxylic acid or anhydride group |
| | 44 | Containing hydroxyl group |
| | 44.5 | Treating with hydrocarbon or halogenated hydrocarbon material |
| | 45 | Treating with steam or water |
| | 45.5 | Treating with mechanical action and in the absence of a chemically reactive additive or solvent |
| | 47 | Treating polymer derived from hydrocarbon monomers only |
| | 47.5 | Treating polysiloxane |
| | 48 | Treating polyester |
| | 49 | Treating polyurethane, polyurea (excluding urea-formaldehyde polymers), polyisocyanurate or polycarbodiimide |
| | 49.8 | Treating polycarbonamide |
| | 50 | CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. |
| | 51 | Processes of preparing a cellular product having an integral skin |
| | 52 | Reticulated cellular product or processes of preparing a reticulated cellular product |
| | 53 | 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 | Treating a cellular solid polymer by adding a solid polymer or solid polymer-forming composition |
| | 55 | Treating a cellular solid polymer by adding a material thereto which forms a composition therewith |
| | 56 | Particle which is expandible, process of preparing an expandible particle, or process of expanding a particle to form a cellular product |
| | 57 | Including step of surface coating a particle or process of expanding a surface coated particle |
| | 58 | Expanding utilizing plural expansion steps |
| | 59 | Expandible system contains two or more solid polymers or at least one solid polymer and at least one polymer-forming system |
| | 60 | Adding expanding agent subsequent to solid polymer formation |
| | 62 | Mixture of solid polymers present during cell formation |
| | 63 | Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step |
| | 64 | Removing a liquid to form a cellular product |
| | 66 | Treating a latex, dispersions, or emulsion containing a solid polymer at 32 degrees F. or below, e.g., freezing, etc. |
| | 67 | Adding -N=C=X material to a latex, dispersion, or emulsion containing a solid polymer |
| | 68 | Adding fibrous material to a latex, dispersion, or emulsion containing a solid polymer |
| | 69 | Latex, dispersion, or emulsion contains an additional solid polymer-forming system |
| | 70 | Latex, dispersion, or emulsion contains two or more solid polymers |
| | 71 | Solid polymer is derived from a conjugated diene monomer |
| | 72 | Utilizing cell forming agent other than air |
| | 74 | By incorporation of material in gaseous state |
| | 75 | System contains two or more solid polymers or contains at least one solid polymer and at least one polymer-forming system |
| | 78 | Preparing a cellular product by spraying a solid polymer containing material |
| | 79 | Extruding a solid polymer containing material to form a cellular product |
| | 80 | Including solid polymer formation in or during extruding step |
| | 81 | System contains a mixture of solid polymer or at least one solid polymer and at least one solid polymer-forming system |
| | 83 | Ingredient is asphaltic, bituminous, or water settable inorganic material, e.g., cement, plaster of Paris, etc. |
| | 84.1 | Ingredient is protein, carbohydrate, or natural resin |
| | 85 | Ingredient contains a boron or phosphorus atom |
| | 86 | Ingredient is organic silicon compound |
| | 87 | Ingredient is aldehyde or ketone |
| | 88 | Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc. |
| | 89 | Ingredient contains a sulfur atom |
| | 90 | Ingredient is a heterocyclic compound |
| | 91 | Ingredient contains a silicon atom |
| | 92 | Ingredient contains a metal atom |
| | 94 | Ingredient is a nitrogen containing compound |
| | 96 | Ingredient contains an -O-O- group |
| | 97 | Ingredient contains a carbon atom double-bonded to oxygen, e.g., carbon dioxide, carboxylic acid, etc. |
| | 98 | Ingredient contains only C and H atoms, only C and halogen atoms, or only C, H, and halogen atoms |
| | 99 | Cellular product formation prior to or during solid polymer formation in the presence of a stated ingredient other than water |
| | 100 | Ingredient is water settable inorganic composition |
| | 101 | Ingredient is bituminous or asphaltic material |
| | 102 | Ingredient is a protein containing material |
| | 103 | Ingredient contains a boron atom |
| | 106 | Ingredient contains a phosphorus atom |
| | 109.1 | Ingredient is carbohydrate, or natural resin |
| | 110 | Ingredient contains a silicon atom as part an organic compound |
| | 111 | Organic silicon atom compound contains an atom other than oxygen, hydrogen, silicon, or carbon |
| | 112 | Organic silicon compound contains an ether group |
| | 113 | Ingredient is aldehyde or ketone |
| | 114 | 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 | -C-X-C- compound contains a nitrogen atom |
| | 116 | -C-X-C- compound contains a -C-XH group wherein X is a chalcogen atom |
| | 117 | 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. |
| | 119 | Ingredient is inorganic halogen containing material |
| | 120 | Ingredient contains a sulfur atom |
| | 122 | Ingredient contains a silicon atom |
| | 123 | Ingredient contains a metal atom |
| | 128 | Ingredient is a nitrogen containing compound |
| | 129 | Nitrogen compound contains a nitrogen atom bonded to three carbon atoms and wherein none of the carbon atoms are double-bonded to oxygen |
| | 130 | Ingredient contains a carbon atom double bonded to oxygen, e.g., carboxylic acid, etc. |
| | 131 | Ingredient contains only carbon and hydrogen atoms, only C and halogen atoms, or only C, H, and halogen atoms |
| | 133 | Ingredient is gaseous at ambient conditions, e.g., air, oxygen, etc. |
| | 134 | Cellular product derived from two or more solid polymers or from at least one solid polymer and at least one polymer-forming system |
| | 136 | At least one polymer is derived from an aldehyde or derivative or wherein the polymer-forming system contains the same type of reactant |
| | 137 | 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 | 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 | 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 | 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 | Cellular vinyl alcohol polymer |
| | 142 | Cellular product derived from ethylenically unsaturated reactants only |
| | 143 | From acyclic mono-unsaturated hydrocarbon as only reactant |
| | 145 | From acyclic mono-unsaturated halogenated reactant |
| | 146 | From aromatic reactant |
| | 149 | From oxygen containing reactant |
| | 150 | From reactant containing two or more ethylenic unsaturated groups |
| | 151 | Cellular polymer derived from tar, pitch, bitumen, asphalt, or plant material of unknown constitution, e.g., nut shell liquor, etc. |
| | 152 | Cellular product derived from boron containing reactant |
| | 153 | Cellular product derived from aluminum or heavy metal containing reactant |
| | 154 | Cellular product derived from silicon containing reactant |
| | 155 | Cellular product derived from a -N=C=X containing reactant wherein X is a chalcogen atom |
| | 156 | With three-membered heterocyclic reactant containing two carbon atoms and a hetero atom (i.e., nitrogen or a chalcogen atom) |
| | 157 | 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 | With ketone, aldehyde, or aldehyde derivative |
| | 159 | N=C=X reactant having at least two C-NH-C(=X)- groups, e.g., prepolymers, etc. |
| | 160 | Two or more N=C=X reactants |
| | 161 | N=C=X reactant contains a heterocyclic ring |
| | 162 | 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 | With nitrogen containing reactant |
| | 164 | 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 |
| | 168 | With phosphorus containing reactant |
| | 170 | With -XH reactant wherein X is a chalcogen atom |
| | 180 | Cellular product derived from a phenol, phenol ether, or inorganic phenolate reactant |
| | 182 | Cellular product derived from a -C-C(=X)-X containing reactant wherein X is a chalcogen atom, e.g., phthalic acid, etc. |
| | 186 | Cellular product derived from reactant which is an aldehyde or aldehyde derivative |
| | 189 | 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 |