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Classification Resources
 
Class   252COMPOSITIONS
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 [List of Pre Grant Publications for class 252 subclass 1][List of Patents for class 252 subclass 1]1 MISCELLANEOUS (E.G., ARTIFICIAL SNOW)
[List of Pre Grant Publications for class 252 subclass 2][List of Patents for class 252 subclass 2]2 FIRE-EXTINGUISHING
[List of Pre Grant Publications for class 252 subclass 601][List of Patents for class 252 subclass 601]601 FIRE RETARDING
 [List of Pre Grant Publications for class 252 subclass 8.57][List of Patents for class 252 subclass 8.57]8.57 LEATHER OR FUR TREATING (OTHER THAN CLEANING COMPOSITIONS OR AUXILIARY COMPOSITIONS FOR CLEANING)
[List of Pre Grant Publications for class 252 subclass 8.61][List of Patents for class 252 subclass 8.61]8.61 DURABLE FINISHES FOR TEXTILE MATERIALS, OR PROCESSES OF PREPARING (E.G., CREASE RESISTANT, MOISTURE ABSORBENT, ANTISTATIC, ETC., FINISHES)
[List of Pre Grant Publications for class 252 subclass 8.81][List of Patents for class 252 subclass 8.81]8.81 TEXTILE PROCESSING AID COMPOSITIONS, OR PROCESSES OF PREPARING (E.G., LUBRICANTS OR ANTISTATIC AGENTS FOR FIBER, YARN, FABRIC, ETC.)
 [List of Pre Grant Publications for class 252 subclass 8.91][List of Patents for class 252 subclass 8.91]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.)
[List of Pre Grant Publications for class 252 subclass 67][List of Patents for class 252 subclass 67]67 VAPORIZATION, OR EXPANSION, REFRIGERATION OR HEAT OR ENERGY EXCHANGE
 [List of Pre Grant Publications for class 252 subclass 68][List of Patents for class 252 subclass 68]68 Subclass 68 indent level is 1 With lubricants, or warning, stabilizing or anti-corrosion agents or persistent gases
 [List of Pre Grant Publications for class 252 subclass 69][List of Patents for class 252 subclass 69]69 Subclass 69 indent level is 1 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.
[List of Pre Grant Publications for class 252 subclass 60][List of Patents for class 252 subclass 60]60 PHYSICAL SEPARATION AGENTS
 [List of Pre Grant Publications for class 252 subclass 62][List of Patents for class 252 subclass 62]62 HEAT OR SOUND INSULATING
 [List of Pre Grant Publications for class 252 subclass 62.2][List of Patents for class 252 subclass 62.2]62.2 ELECTROLYTES FOR ELECTRICAL DEVICES (E.G., RECTIFIER, CONDENSER)
[List of Pre Grant Publications for class 252 subclass 62.3R][List of Patents for class 252 subclass 62.3R]  62.3R BARRIER LAYER DEVICE COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 62.51R][List of Patents for class 252 subclass 62.51R]  62.51R MAGNETIC
[List of Pre Grant Publications for class 252 subclass 62.9R][List of Patents for class 252 subclass 62.9R]  62.9R PIEZOELECTRIC
 [List of Pre Grant Publications for class 252 subclass 567][List of Patents for class 252 subclass 567]567 DEFINED LIQUID DIELECTRIC DISPERSED IN DEFINED WEB OR SHEET
[List of Pre Grant Publications for class 252 subclass 570][List of Patents for class 252 subclass 570]570 FLUENT DIELECTRIC
 [List of Pre Grant Publications for class 252 subclass 70][List of Patents for class 252 subclass 70]70 FROST-PREVENTING, ICE-THAWING, THERMOSTATIC, THERMOPHORIC, OR CRYOGENIC
[List of Pre Grant Publications for class 252 subclass 71][List of Patents for class 252 subclass 71]71 HEAT-EXCHANGE, LOW-FREEZING OR POUR POINT, OR HIGH BOILING COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 79.1][List of Patents for class 252 subclass 79.1]79.1 ETCHING OR BRIGHTENING COMPOSITIONS
 [List of Pre Grant Publications for class 252 subclass 88.1][List of Patents for class 252 subclass 88.1]88.1 DUST SUPPRESSANTS FOR BULK MATERIALS, OR PROCESSES OF PREPARING (E.G., FOR CONSOLIDATING DUST IN COAL MINES, CONTROLLING SOIL EROSION, ETC.)
 [List of Pre Grant Publications for class 252 subclass 88.2][List of Patents for class 252 subclass 88.2]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.
[List of Pre Grant Publications for class 252 subclass 175][List of Patents for class 252 subclass 175]175 WATER-SOFTENING OR PURIFYING OR SCALE-INHIBITING AGENTS
[List of Pre Grant Publications for class 252 subclass 181.1][List of Patents for class 252 subclass 181.1]181.1 GETTERS OR GAS OR VAPOR GENERATING MATERIALS FOR ELECTRIC LAMPS, ELECTRIC SPACE DISCHARGE DEVICES, AND SIMILAR DEVICES
 [List of Pre Grant Publications for class 252 subclass 194][List of Patents for class 252 subclass 194]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.
 [List of Pre Grant Publications for class 252 subclass 478][List of Patents for class 252 subclass 478]478 X-RAY OR NEUTRON SHIELD
[List of Pre Grant Publications for class 252 subclass 500][List of Patents for class 252 subclass 500]500 ELECTRICALLY CONDUCTIVE OR EMISSIVE COMPOSITIONS
 [List of Pre Grant Publications for class 252 subclass 501.1][List of Patents for class 252 subclass 501.1]501.1 Subclass 501.1 indent level is 1 Light sensitive
[List of Pre Grant Publications for class 252 subclass 502][List of Patents for class 252 subclass 502]502 Subclass 502 indent level is 1 Elemental carbon containing
[List of Pre Grant Publications for class 252 subclass 512][List of Patents for class 252 subclass 512]512 Subclass 512 indent level is 1 Free metal containing
 [List of Pre Grant Publications for class 252 subclass 516][List of Patents for class 252 subclass 516]516 Subclass 516 indent level is 1 Carbide containing
 [List of Pre Grant Publications for class 252 subclass 517][List of Patents for class 252 subclass 517]517 Subclass 517 indent level is 1 Radioactive material containing
[List of Pre Grant Publications for class 252 subclass 518.1][List of Patents for class 252 subclass 518.1]518.1 Subclass 518.1 indent level is 1 Metal compound containing
[List of Pre Grant Publications for class 252 subclass 519.1][List of Patents for class 252 subclass 519.1]519.1 Subclass 519.1 indent level is 2 Compound viewed as composition (i.e., wherein atoms or molecules in a chemical formula are not present as whole small integer values or cannot be multiplied by a single-digit factor to yield integer values)
[List of Pre Grant Publications for class 252 subclass 519.2][List of Patents for class 252 subclass 519.2]519.2 Subclass 519.2 indent level is 2 Organometallic (e.g., soap, complex, etc.)
[List of Pre Grant Publications for class 252 subclass 519.3][List of Patents for class 252 subclass 519.3]519.3 Subclass 519.3 indent level is 2 With organic compound
 [List of Pre Grant Publications for class 252 subclass 519.4][List of Patents for class 252 subclass 519.4]519.4 Subclass 519.4 indent level is 2 Sulfur, selenium, or tellurium containing
[List of Pre Grant Publications for class 252 subclass 519.5][List of Patents for class 252 subclass 519.5]519.5 Subclass 519.5 indent level is 2 Zinc compound
 [List of Pre Grant Publications for class 252 subclass 520.1][List of Patents for class 252 subclass 520.1]520.1 Subclass 520.1 indent level is 2 Tin compound
[List of Pre Grant Publications for class 252 subclass 520.2][List of Patents for class 252 subclass 520.2]520.2 Subclass 520.2 indent level is 2 Titanium or zirconium compound
 [List of Pre Grant Publications for class 252 subclass 520.3][List of Patents for class 252 subclass 520.3]520.3 Subclass 520.3 indent level is 2 Silver, gold, or platinum compound
 [List of Pre Grant Publications for class 252 subclass 520.4][List of Patents for class 252 subclass 520.4]520.4 Subclass 520.4 indent level is 2 Vanadium compound
 [List of Pre Grant Publications for class 252 subclass 520.5][List of Patents for class 252 subclass 520.5]520.5 Subclass 520.5 indent level is 2 Tungsten or yttrium compound
 [List of Pre Grant Publications for class 252 subclass 521.1][List of Patents for class 252 subclass 521.1]521.1 Subclass 521.1 indent level is 2 Rare earth metal compound
 [List of Pre Grant Publications for class 252 subclass 521.2][List of Patents for class 252 subclass 521.2]521.2 Subclass 521.2 indent level is 2 Iron, cobalt, or nickel compound
 [List of Pre Grant Publications for class 252 subclass 521.3][List of Patents for class 252 subclass 521.3]521.3 Subclass 521.3 indent level is 2 Silicon containing or with silicon compound
 [List of Pre Grant Publications for class 252 subclass 521.4][List of Patents for class 252 subclass 521.4]521.4 Subclass 521.4 indent level is 2 Boron containing or with boron compound
 [List of Pre Grant Publications for class 252 subclass 521.5][List of Patents for class 252 subclass 521.5]521.5 Subclass 521.5 indent level is 2 Halogen, carbon, phosphorus, or nitrogen containing
 [List of Pre Grant Publications for class 252 subclass 521.6][List of Patents for class 252 subclass 521.6]521.6 Subclass 521.6 indent level is 2 With nonmetal compound containing halogen, nitrogen, phosphorus, or sulfur
 [List of Pre Grant Publications for class 252 subclass 492][List of Patents for class 252 subclass 492]492 INCANDESCENT MANTLE COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 299.01][List of Patents for class 252 subclass 299.01]299.01 LIQUID CRYSTAL COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 582][List of Patents for class 252 subclass 582]582 LIGHT TRANSMISSION MODIFYING COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 625][List of Patents for class 252 subclass 625]625 RADIOACTIVE COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 301.16][List of Patents for class 252 subclass 301.16]301.16 ORGANIC LUMINESCENT MATERIAL CONTAINING COMPOSITIONS
 [List of Pre Grant Publications for class 252 subclass 301.36][List of Patents for class 252 subclass 301.36]301.36 INORGANIC LUMINESCENT COMPOSITIONS WITH ORGANIC NONLUMINESCENT MATERIAL
[List of Pre Grant Publications for class 252 subclass 301.4R][List of Patents for class 252 subclass 301.4R]  301.4R INORGANIC LUMINESCENT COMPOSITIONS
 [List of Pre Grant Publications for class 252 subclass 700][List of Patents for class 252 subclass 700]700 CHEMILUMINESCENT
 [List of Pre Grant Publications for class 252 subclass 182.1][List of Patents for class 252 subclass 182.1]182.1 HAVING UTILITY AS A REACTIVE MATERIAL IN AN ELECTROCHEMICAL CELL; E.G., BATTERY, ETC.
 [List of Pre Grant Publications for class 252 subclass 184][List of Patents for class 252 subclass 184]184 ABSORPTIVE, OR BINDIVE, AND CHEMICALLY YIELDIVE (E.G., ION EXCHANGER)
 [List of Pre Grant Publications for class 252 subclass 185][List of Patents for class 252 subclass 185]185 PLUMBIFEROUS SULPHUR BINDANT OR MODIFIANT CONTAINING
[List of Pre Grant Publications for class 252 subclass 186.1][List of Patents for class 252 subclass 186.1]186.1 OXIDATIVE BLEACHANT, OXIDANT CONTAINING, OR GENERATIVE
 [List of Pre Grant Publications for class 252 subclass 186.2][List of Patents for class 252 subclass 186.2]186.2 Subclass 186.2 indent level is 1 Composition containing two or more solid materials with defined physical dimensions; e.g., surface areas, volumes, etc., or process of producing said composition
[List of Pre Grant Publications for class 252 subclass 186.21][List of Patents for class 252 subclass 186.21]186.21 Subclass 186.21 indent level is 1 Plural oxidants
 [List of Pre Grant Publications for class 252 subclass 186.24][List of Patents for class 252 subclass 186.24]186.24 Subclass 186.24 indent level is 1 Contains elemental material devoid of water
[List of Pre Grant Publications for class 252 subclass 186.25][List of Patents for class 252 subclass 186.25]186.25 Subclass 186.25 indent level is 1 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
[List of Pre Grant Publications for class 252 subclass 186.38][List of Patents for class 252 subclass 186.38]186.38 Subclass 186.38 indent level is 1 Contains activator admixed with inorganic peroxide
 [List of Pre Grant Publications for class 252 subclass 186.42][List of Patents for class 252 subclass 186.42]186.42 Subclass 186.42 indent level is 1 Contains organic peroxide
 [List of Pre Grant Publications for class 252 subclass 186.43][List of Patents for class 252 subclass 186.43]186.43 Subclass 186.43 indent level is 1 Contains inorganic peroxide
 [List of Pre Grant Publications for class 252 subclass 186.44][List of Patents for class 252 subclass 186.44]186.44 Subclass 186.44 indent level is 1 Contains inorganic nitrogen containing compound
[List of Pre Grant Publications for class 252 subclass 187.1][List of Patents for class 252 subclass 187.1]187.1 Subclass 187.1 indent level is 1 Free halogen or oxy-halogen acid type
[List of Pre Grant Publications for class 252 subclass 188.1][List of Patents for class 252 subclass 188.1]188.1 REDUCTIVE BLEACHANT, DEOXIDANT, REDUCTANT, OR GENERATIVE
[List of Pre Grant Publications for class 252 subclass 189][List of Patents for class 252 subclass 189]189 CO, S, NEGATIVE ELEMENT, OR ACID, BINDANT CONTAINING
 [List of Pre Grant Publications for class 252 subclass 193][List of Patents for class 252 subclass 193]193 AMMONIA, ALKALI OR BASE, BINDANT CONTAINING
 [List of Pre Grant Publications for class 252 subclass 363.5][List of Patents for class 252 subclass 363.5]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.
 [List of Pre Grant Publications for class 252 subclass 364][List of Patents for class 252 subclass 364]364 SOLVENTS
[List of Pre Grant Publications for class 252 subclass 365][List of Patents for class 252 subclass 365]365 ANTI-INGESTIBLE OR DENATURED
 [List of Pre Grant Publications for class 252 subclass 367.1][List of Patents for class 252 subclass 367.1]367.1 SOAPS (I.E., ALKALI-METAL SALTS OF WATER-INSOLUBLE FATTY ACIDS OR OF ROSIN ACIDS)
[List of Pre Grant Publications for class 252 subclass 372][List of Patents for class 252 subclass 372]372 GASEOUS COMPOSITIONS
[List of Pre Grant Publications for class 252 subclass 378R][List of Patents for class 252 subclass 378R]  378R EXFOLIATED OR INTUMESCED
[List of Pre Grant Publications for class 252 subclass 380][List of Patents for class 252 subclass 380]380 PRESERVATIVE AGENTS
[List of Pre Grant Publications for class 252 subclass 381][List of Patents for class 252 subclass 381]381 Subclass 381 indent level is 1 Anti-caking, separative or protective coatings or zones
[List of Pre Grant Publications for class 252 subclass 387][List of Patents for class 252 subclass 387]387 Subclass 387 indent level is 1 Anti-corrosion
[List of Pre Grant Publications for class 252 subclass 397][List of Patents for class 252 subclass 397]397 Subclass 397 indent level is 1 Anti-oxidants or chemical change inhibitants
 [List of Pre Grant Publications for class 252 subclass 408.1][List of Patents for class 252 subclass 408.1]408.1 NONREACTIVE ANALYTICAL, TESTING, OR INDICATING COMPOSITIONS
 [List of Pre Grant Publications for class 252 subclass 600][List of Patents for class 252 subclass 600]600 RADIATION SENSITIVE
[List of Pre Grant Publications for class 252 subclass 182.11][List of Patents for class 252 subclass 182.11]182.11 COMPOSITIONS CONTAINING A SINGLE CHEMICAL REACTANT OR PLURAL NONINTERACTIVE CHEMICAL REACTANTS; I.E., NOT VIS-A-VIS
[List of Pre Grant Publications for class 252 subclass 183.11][List of Patents for class 252 subclass 183.11]183.11 CHEMICALLY INTERACTIVE REACTANTS (VIS-A-VIS)
 
CROSS-REFERENCE ART COLLECTIONS
 
[List of Pre Grant Publications for class 252 subclass 950][List of Patents for class 252 subclass 950]950 DOPING AGENT SOURCE MATERIAL
 [List of Pre Grant Publications for class 252 subclass 960][List of Patents for class 252 subclass 960]960 SURFACE FLAW DETECTING COMPOSITIONS
 [List of Pre Grant Publications for class 252 subclass 961][List of Patents for class 252 subclass 961]961 STRESS OR CONTACT INDICATORS
 [List of Pre Grant Publications for class 252 subclass 962][List of Patents for class 252 subclass 962]962 TEMPERATURE OR THERMAL HISTORY
 [List of Pre Grant Publications for class 252 subclass 963][List of Patents for class 252 subclass 963]963 HUMIDITY OR MOISTURE INDICATORS
 [List of Pre Grant Publications for class 252 subclass 964][List of Patents for class 252 subclass 964]964 LEAK DETECTION
 [List of Pre Grant Publications for class 252 subclass 965][List of Patents for class 252 subclass 965]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)
      FOR113          SWEEPING OR DUST OR PARTICLE ADHERENT (252/88)
  FOR247          SOAPS (ALKALI-METAL SALTS OF WATER-INSOLUBLE FATTY OR ROSIN ACIDS) (252/367)
 
DIGESTS
 
 [List of Pre Grant Publications for class 252 subclass DIG18][List of Patents for class 252 subclass DIG18] DIG18 ACTIVATION-PLATINUM