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| Class 252 | COMPOSITIONS |
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![[List of Pre Grant Publications for class 252 subclass 1]](../as.gif) | ![[List of Patents for class 252 subclass 1]](../ps.gif) | 1 | MISCELLANEOUS (E.G., ARTIFICIAL SNOW) |
| | 2 | FIRE-EXTINGUISHING |
| | 3 |  Foam or gas phase containing |
| | 4 | Gas generative, chemically |
| | 5 |  Dry, combustion type |
| | 6 | Low temperature chemically interreactive |
| | 7 | Carbonates or ammonium salts containing or pyrolytic |
| | 8 | Volatile or gas charged liquids containing |
| | 8.05 | Foam-stabilizant or colloid-stabilizant containing |
| | 601 | FIRE RETARDING |
| | 602 | Having disparate function |
| | 603 | For living matter |
| | 604 | Material physically quantified |
| | 605 | Containing gas |
| | 606 | Intumescent |
| | 607 | For wood or cellulosic material other than textile |
| | 608 | For textile (i.e., woven material) |
| | 609 | For solid synthetic polymer and reactants thereof |
| | 610 | Dispersion or colloidal system |
| | 611 | For dispersion or colloidal system |
| Class 507 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class. | ||
| | 8.57 | LEATHER OR FUR TREATING (OTHER THAN CLEANING COMPOSITIONS OR AUXILIARY COMPOSITIONS FOR CLEANING) |
| | 8.61 | DURABLE FINISHES FOR TEXTILE MATERIALS, OR PROCESSES OF PREPARING (E.G., CREASE RESISTANT, MOISTURE ABSORBENT, ANTISTATIC, ETC., FINISHES) |
| | 8.81 | TEXTILE PROCESSING AID COMPOSITIONS, OR PROCESSES OF PREPARING (E.G., LUBRICANTS OR ANTISTATIC AGENTS FOR FIBER, YARN, FABRIC, ETC.) |
| | 8.82 | For tire cord yarn, elastomeric filaments, or biologically innocuous or absorbable fibers (e.g., textiles used in food packaging, absorbable surgical sutures, etc.) |
| | 8.83 | Sizing agents (e.g., for weaving yarn, etc.) |
| | 8.85 | For textile materials consisting wholly or in part of animal hair fibers (e.g., wool, etc.) |
| | 8.91 | COMPOSITIONS FOR ENHANCING THE APPEARANCE OF CONSUMER TEXTILE GOODS (OTHER THAN CLEANING COMPOSITIONS OR AUXILIARY COMPOSITIONS FOR CLEANING), OR PROCESSES OF PREPARING (E.G., ANTISTATIC OR WRINKLE-REMOVING SPRAY FOR GARMENTS, ETC.) |
| | 67 | VAPORIZATION, OR EXPANSION, REFRIGERATION OR HEAT OR ENERGY EXCHANGE |
| | 68 | With lubricants, or warning, stabilizing or anti-corrosion agents or persistent gases |
| | 69 | With low-volatile solvent or absorbent |
| Class 508 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class. | ||
| | 60 | PHYSICAL SEPARATION AGENTS |
| | 62 | HEAT OR SOUND INSULATING |
| | 62.2 | ELECTROLYTES FOR ELECTRICAL DEVICES (E.G., RECTIFIER, CONDENSER) |
| | 62.3R | BARRIER LAYER DEVICE COMPOSITIONS |
| | 62.3T | Thermoelectric |
| | 62.3Q | Organic |
| | 62.3E | Free element containing |
| | 62.3GA | Group III element containing binary compound; e.g., Ga, As |
| | 62.3ZB | Groups II and V elements containing binary compund; e.g., zinc, bismuth |
| | 62.3ZT | Groups II and VI elements containing binary compound; e.g., Zn, Te |
| | 62.3V | Group VI element-containing |
| | 62.3C | Binary alloy or carbide; e.g., Al, In, LiC |
| | 62.51R | MAGNETIC |
| | 62.52 | Flaw detection or magnetic clutch |
| | 62.53 | With wax, bitumen, resin, or gum |
| | 62.55 | Free metal or alloy containing |
| | 62.56 | Iron-oxygen compound containing |
| | 62.57 | With scandium, yttrium, gallium, rare earth, or actinide |
| | 62.58 | With boron, aluminum, thallium, or indium |
| | 62.59 | With titanium, zirconium, silicon, hafnium, germanium, or tin |
| | 62.6 | With Group I metal |
| | 62.62 | With Group II metal or lead |
| | 62.51C | Chromium or chromium compound containing |
| | 62.9R | PIEZOELECTRIC |
| | 567 | DEFINED LIQUID DIELECTRIC DISPERSED IN DEFINED WEB OR SHEET |
| | 570 | FLUENT DIELECTRIC |
| | 571 | Gaseous or gas-containing |
| | 572 | Metal- or insoluble component-containing; e.g., slurry, grease, etc. |
| | 573 | Si-containing |
| | 574 | B-, P-, S-, Se-, or Te-containing |
| | 575 | N-containing |
| | 578 | O-containing |
| | 581 | Halogenated polycyclic compound-containing |
| | 70 | FROST-PREVENTING, ICE-THAWING, THERMOSTATIC, THERMOPHORIC, OR CRYOGENIC |
| | 71 | HEAT-EXCHANGE, LOW-FREEZING OR POUR POINT, OR HIGH BOILING COMPOSITIONS |
| | 72 | With leak-stopping agents |
| | 73 | Organic components |
| | 79.1 | ETCHING OR BRIGHTENING COMPOSITIONS |
| | 88.1 | DUST SUPPRESSANTS FOR BULK MATERIALS, OR PROCESSES OF PREPARING (E.G., FOR CONSOLIDATING DUST IN COAL MINES, CONTROLLING SOIL EROSION, ETC.) |
| | 88.2 | COMPOSITIONS FOR COATING OR IMPREGNATING A SUBSTRATE USED FOR COLLECTING FINE PARTICLES BY ADHERENCE, OR PROCESSES OF PREPARING (E.G., FOR IMPREGNATING DUSTING CLOTHS, DUST FILTERS, ETC.) |
| Class 510 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class. | ||
| | 175 | WATER-SOFTENING OR PURIFYING OR SCALE-INHIBITING AGENTS |
| | 176 | Packages or heterogeneous arrangements |
| | 178 | Deoxidant or free-metal containing |
| | 179 | Water-insoluble base-exchange agent containing |
| | 180 | Plant or organic material containing |
| | 181.1 | GETTERS OR GAS OR VAPOR GENERATING MATERIALS FOR ELECTRIC LAMPS, ELECTRIC SPACE DISCHARGE DEVICES, AND SIMILAR DEVICES |
| | 181.2 | Plural getter and/or gas or vapor generating materials |
| | 181.3 | Reactive compositions |
| | 181.5 | Gaseous getters |
| | 181.6 | Metal or metal compound containing |
| | 194 | HUMIDOSTATIC, WATER REMOVIVE, BINDIVE, OR EMISSIVE |
| Class 502 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class. | ||
| | 478 | X-RAY OR NEUTRON SHIELD |
| | 500 | ELECTRICALLY CONDUCTIVE OR EMISSIVE COMPOSITIONS |
| | 501.1 | Light sensitive |
| | 502 | Elemental carbon containing |
| | 503 | With free metal |
| | 504 | With carbide |
| | 505 | With radioactive material |
| | 506 | With metal compound |
| | 507 |  Titanium or zirconium compound |
| | 508 | Aluminum compound |
| | 509 | Magnesium, alkaline earth metal, or rare earth metal compound |
| | 510 | With organic component |
| | 512 | Free metal containing |
| | 513 | Iron group metal (iron, cobalt, nickel) |
| | 514 | Noble metal (gold, silver, ruthenium, rhodium, palladium, osmium, iridium, platinum) |
| | 515 | Tungsten |
| | 516 | Carbide containing |
| | 517 | Radioactive material containing |
| | 518.1 | Metal compound containing |
| | 519.12 | Titanium containing |
| | 519.13 | Bismuth, ruthenium, or iridium containing |
| | 519.14 | Sulfur, tellurium, selenium, nitrogen, phosphorus, or boron containing |
| | 519.15 | Four diverse metals containing |
| | 519.2 | Organometallic (e.g., soap, complex, etc.) |
| | 519.3 | With organic compound |
| | 519.31 | The organic compound contains silicon |
| | 519.32 | The organic compound is a natural resin, protein, lignin, carbohydrate, or derivative thereof |
| | 519.33 | The organic compound is a polymer |
| | 519.4 | Sulfur, selenium, or tellurium containing |
| | 519.5 | Zinc compound |
| | 519.51 | Additional diverse metal containing |
| | 519.52 | With boron compound |
| | 519.53 | With halogen compound |
| | 519.54 | Silicon containing or with compound of bismuth or silicon |
| | 520.1 | Tin compound |
| | 520.2 | Titanium or zirconium compound |
| | 520.21 | Additional diverse metal containing |
| | 520.22 | Boron, silicon, phosphorus, nitrogen, hydrogen, carbon, or halogen containing |
| | 520.3 | Silver, gold, or platinum compound |
| | 520.4 | Vanadium compound |
| | 520.5 | Tungsten or yttrium compound |
| | 521.1 | Rare earth metal compound |
| | 521.2 | Iron, cobalt, or nickel compound |
| | 521.3 | Silicon containing or with silicon compound |
| | 521.4 | Boron containing or with boron compound |
| | 521.5 | Halogen, carbon, phosphorus, or nitrogen containing |
| | 521.6 | With nonmetal compound containing halogen, nitrogen, phosphorus, or sulfur |
| | 492 | INCANDESCENT MANTLE COMPOSITIONS |
| | 299.01 | LIQUID CRYSTAL COMPOSITIONS |
| | 299.1 | Containing pleochroic dye |
| | 299.2 | Containing dopant salt |
| | 299.3 | Containing charge-transfer agents |
| | 299.4 | Containing nonchiral aligning agents |
| | 299.5 | Containing nonchiral additive having no specified mesophase |
| | 299.6 | Containing nonsteryl liquid crystalline compound of specified structure |
| | 299.61 | Including heterocyclic ring |
| | 299.62 | Including fused or bridged rings |
| | 299.63 | Including fully saturated ring |
| | 299.64 | Aryl ester of aryl acid having three benzene rings |
| | 299.66 | Benzene rings linked by direct bond |
| | 299.67 | Phenyl benzoate derivative |
| | 299.68 | Including benzene rings bonded through azo, azoxy, or azomethine linkage |
| | 299.7 | Cholesteric liquid crystal composition containing a sterol derivative |
| | 582 | LIGHT TRANSMISSION MODIFYING COMPOSITIONS |
| | 583 | Modification caused by energy other than light |
| | 584 | Inorganic crystalline solid |
| | 585 | Producing polarized light |
| | 586 | Displaying color change |
| | 587 | Infrared |
| | 588 | Ultraviolet |
| | 625 | RADIOACTIVE COMPOSITIONS |
| | 634 | In form of sol solution or gel |
| | 636 | Nuclear reactor fuel |
| | 637 | Actinide having nonactinide component |
| | 641 | Actinide nitrides only |
| | 642 | Actinide carbides only |
| | 643 | Actinide oxides only |
| | 644 | As a source of radiation or heat |
| | 646 | Luminescent |
| | 301.16 | ORGANIC LUMINESCENT MATERIAL CONTAINING COMPOSITIONS |
| | 301.17 | Scintillating or lasing compositions |
| | 301.19 | Inspection penetrant compositions |
| | 301.21 | Optical brightening compositions |
| | 301.22 | Heterocyclic compounds having an intercyclic acyclic methine linkage |
| | 301.25 | Azine containing |
| | 301.26 | Six-membered ring having one hetero-N-atom |
| | 301.27 | Azole containing |
| | 301.31 | Five-membered ring having four carbon atoms and one nitrogen atom |
| | 301.32 | Hetero-S-atom or hetero-O-atom containing |
| | 301.33 | With inorganic luminescent material |
| | 301.34 | Natural resin, cellulose, or derivatives containing |
| | 301.35 | Synthetic resin containing |
| | 301.36 | INORGANIC LUMINESCENT COMPOSITIONS WITH ORGANIC NONLUMINESCENT MATERIAL |
| | 301.4R | INORGANIC LUMINESCENT COMPOSITIONS |
| | 301.5 | Tungsten containing |
| | 301.6R | Zinc or cadmium containing |
| | 301.4S | Sulfur containing |
| | 301.4P | Phosphorus containing |
| | 301.4F | Group IV element containing |
| | 301.4H | Compositions containing halogen; e.g., halides and oxyhalides |
| | 700 | CHEMILUMINESCENT |
| | 182.1 | HAVING UTILITY AS A REACTIVE MATERIAL IN AN ELECTROCHEMICAL CELL; E.G., BATTERY, ETC. |
| | 184 | ABSORPTIVE, OR BINDIVE, AND CHEMICALLY YIELDIVE (E.G., ION EXCHANGER) |
| | 185 | PLUMBIFEROUS SULPHUR BINDANT OR MODIFIANT CONTAINING |
| | 186.1 | OXIDATIVE BLEACHANT, OXIDANT CONTAINING, OR GENERATIVE |
| | 186.2 | Composition containing two or more solid materials with defined physical dimensions; e.g., surface areas, volumes, etc., or process of producing said composition |
| | 186.21 | Plural oxidants |
| | 186.24 | Contains elemental material devoid of water |
| | 186.25 | Composition containing a stabilizer or a product in the form of a surface-modified, impregnated, encapsulated, or surface-coated article; or process of producing said composition |
| | 186.26 | Organic peroxide |
| | 186.27 | Inorganic peroxide |
| | 186.33 | Contains Group VIIB or Group VIII metal or compound thereof |
| | 186.34 | Contains organohalogen compound as oxidant |
| | 186.36 | Contains free halogen or oxy-halogen acid type |
| | 186.38 | Contains activator admixed with inorganic peroxide |
| | 186.42 | Contains organic peroxide |
| | 186.43 | Contains inorganic peroxide |
| | 186.44 | Contains inorganic nitrogen containing compound |
| | 187.1 | Free halogen or oxy-halogen acid type |
| | 188.1 | REDUCTIVE BLEACHANT, DEOXIDANT, REDUCTANT, OR GENERATIVE |
| | 188.2 | Sulfur containing reductant, bleachant, deoxidant, or generative |
| | 188.25 | Hydrogen generating |
| | 188.26 | Hydride containing |
| | 188.28 | Deoxidant or oxygen scavenging |
| | 189 | CO, S, NEGATIVE ELEMENT, OR ACID, BINDANT CONTAINING |
| | 193 | AMMONIA, ALKALI OR BASE, BINDANT CONTAINING |
| | 363.5 | SOLIDS WITH SOLUTION OR DISPERSION AIDS |
| Class 516 is an integral part of this Class (Class 252), as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class. | ||
| | 364 | SOLVENTS |
| | 365 | ANTI-INGESTIBLE OR DENATURED |
| | 367.1 | SOAPS (I.E., ALKALI-METAL SALTS OF WATER-INSOLUBLE FATTY ACIDS OR OF ROSIN ACIDS) |
| | 372 | GASEOUS COMPOSITIONS |
| | 378R | EXFOLIATED OR INTUMESCED |
| | 380 | PRESERVATIVE AGENTS |
| | 381 | Anti-caking, separative or protective coatings or zones |
| | 382 | Foams, liquids, or fluids |
| | 383 | Organic and inorganic matter containing |
| | 384 | Organic compound containing |
| | 385 | Inorganic compound or element containing |
| | 387 | Anti-corrosion |
| | 388 | Organic compound containing |
| | 389.1 | Component inorganic or organic comprising element other than C,H,O,N,S, and halogen |
| | 389.2 |  Phosphorus containing |
| | 389.21 |  Nitrogen and/or sulfur in phosphorus compound |
| | 389.23 | Pentavalent P, except H(n+2)PnO(3n+1) |
| | 389.24 | Trivalent P (e.g., phosphorus acid, phosphites, etc.) |
| | 389.3 | Silicon containing |
| | 389.4 | Boron containing |
| | 389.5 | Chromium containing |
| | 389.51 | Lead containing |
| | 389.52 | Zinc or aluminium containing |
| | 389.53 | Nickel, iron, cobalt, copper, manganese, mercury, or cadmium containing |
| | 389.54 | Molybdenum, arsenic, antimony, vanadium, bismuth, tungsten, selenium, or tellurium containing |
| | 389.61 | Group IIA metal containing |
| | 389.62 | Alkali metal or NH4+ containing |
| | 390 | Amine, amide, azo, or nitrogen-base radical containing |
| | 393 | Phenol or quinone radical containing |
| | 394 | Nitrogen organic compound containing |
| | 395 | Sulphur organic compound containing |
| | 396 | Oxygen organic compound containing |
| | 397 | Anti-oxidants or chemical change inhibitants |
| | 398 | Plant or animal matters of unknown compositions |
| | 399 | Organic compound containing |
| | 400.1 | Component inorganic or organic comprising element other than C,H,O,N,S, and halogen |
| | 400.2 | Phosphorus containing |
| | 400.21 | Nitrogen or sulfur in phosphorus compound |
| | 400.23 | Pentavalent P, but not fully oxygenated |
| | 400.24 | Trivalent P (e.g., phosphorous acid, phosphites, etc.) |
| | 400.3 | Silicon containing |
| | 400.4 | Boron containing |
| | 400.5 | Chromium containing |
| | 400.51 | Lead containing |
| | 400.52 | Zinc or aluminium containing |
| | 400.53 | Nickel, iron, cobalt, copper, manganese, mercury, or cadmium containing |
| | 400.54 | Molybdenum, arsenic, antimony, vanadium, bismuth, tungsten, selenium, or tellurium containing |
| | 400.61 | Group IIA metal containing |
| | 400.62 | Alkali metal or NH4+ containing |
| | 401 | Amine, amide, azo, or nitrogen-base radical containing |
| | 404 | Phenol or quinone radical containing |
| | 405 | Nitrogen organic compound containing |
| | 406 | Sulphur organic compound containing |
| | 407 | Oxygen organic compound containing |
| | 408.1 | NONREACTIVE ANALYTICAL, TESTING, OR INDICATING COMPOSITIONS |
| | 600 | RADIATION SENSITIVE |
| | 182.11 | COMPOSITIONS CONTAINING A SINGLE CHEMICAL REACTANT OR PLURAL NONINTERACTIVE CHEMICAL REACTANTS; I.E., NOT VIS-A-VIS |
| | 182.12 | Organic reactant |
| | 182.13 | For subsequent solid polymer treatment or preparation; e.g., crosslinking, grafting, curing, hardening, vulcanizing, etc. |
| | 182.14 | Reactant contains element other than C, H, O, or N |
| | 182.18 | Reactant contains ethylenic group |
| | 182.2 | Reactant contains isocyante (-N=C=O) or blocked isocyanate group |
| | 182.23 | Reactant contains oxygen |
| | 182.29 | With stabilizer or inhibitor |
| | 182.3 | Reactant contains phosphorus, silicon, or sulfur atom, or contains metal-to-carbon bond |
| | 182.31 | Reactant contains phenolic, phenolic ether, or inorganic phenolate group |
| | 182.32 | Inorganic reactant other than sulfur containing |
| | 183.11 | CHEMICALLY INTERACTIVE REACTANTS (VIS-A-VIS) |
| | 183.12 | With stabilizer or inhibitor |
| | 183.13 | Organic reactant admixed with inorganic reactant |
| | 183.14 | Inorganic reactants only |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 950 | DOPING AGENT SOURCE MATERIAL |
| | 960 | SURFACE FLAW DETECTING COMPOSITIONS |
| | 961 | STRESS OR CONTACT INDICATORS |
| | 962 | TEMPERATURE OR THERMAL HISTORY |
| | 963 | HUMIDITY OR MOISTURE INDICATORS |
| | 964 | LEAK DETECTION |
| | 965 | RETROSPECTIVE PRODUCT IDENTIFICATION (E.G., TAGS AND TRACERS, ETC.) |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
| FOR100 | TEXTILE TREATING (252/8.6) |
| FOR101 | Organic sulphoxy compound containing (252/8.7) |
| FOR103 | Organic amine or amide containing (252/8.8) |
| FOR104 | Ether group containing (252/8.9) |
| FOR113 | SWEEPING OR DUST OR PARTICLE ADHERENT (252/88) |
| FOR247 | SOAPS (ALKALI-METAL SALTS OF WATER-INSOLUBLE FATTY OR ROSIN ACIDS) (252/367) |
| FOR248 | Products (252/368) |
| FOR249 | Including saponification (252/369) |
| FOR251 | Metal compound containing (252/518) |
| DIGESTS | ||
| | DIG18 | ACTIVATION-PLATINUM |
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