Subsection: CHEMISTRY
C01 INORGANIC CHEMISTRY
C01B Non-metallic elements; Compounds thereofC01C Ammonia; Cyanogen; Compounds thereof
C01D Compounds of alkali metals, i.e. lithium, sodium,potassium, rubidium, caesium, or francium
C01F Compounds of the metals beryllium, magnesium,aluminium, calcium, strontium, barium, radium,thorium, or of the rare-earth metals
C01G Compounds containing metals not covered by subclasses C01D or F
C02 TREATMENT OFWATER,WASTEWATER,SEWAGE, OR SLUDGE
C02F Treatment of water, waste water, sewage, or sludgeC03 GLASS; MINERAL OR SLAGWOOL
C03B Manufacture, shaping, or supplementary processesC03C Chemical composition of glasses, glazes, or vitreous enamels; Surface treatment of glass;Surface treatment of fibres or filaments from glass,minerals or slags; Joining glass to glass or other materials
C04 CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
C04B Lime; Magnesia; Slag; Cements; Compositions thereof, e.g. mortars, concrete or like building materials; Artificial stone; Ceramics; Refractories;Treatment of natural stoneC05 FERTILISERS; MANUFACTURE THEREOF
C05B Phosphatic fertilisersC05C Nitrogenous fertilisers
C05D Inorganic fertilisers not covered by subclasses C05B, C; Fertilisers producing carbon dioxide
C05F Organic fertilisers not covered by subclasses C05B, C, e.g. fertilisers from waste or refuse
C05G Mixtures of fertilisers covered individually by different subclasses of class C 05; Mixtures of one or more fertilisers with materials not having a specific fertilising activity, e.g. pesticides, soilconditioners,wetting agents; Fertilisers characterised by their form
C06 EXPLOSIVES; MATCHES
C06B Explosive or thermic compositions; Manufacture thereof; Use of single substances as explosivesC06C Detonating or priming devices; Fuses; Chemical lighters; Pyrophoric compositions
C06D Means for generating smoke or mist; Gas-attack compositions; Generation of gas for blasting or propulsion
C06F Matches; Manufacture of matches
C07 ORGANIC CHEMISTRY
C07B General methods of organic chemistry; Apparatus thereforC07C Acyclic or carbocyclic compounds
C07D Heterocyclic compounds
C07F Acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen,halogen, oxygen, nitrogen, sulfur, selenium, or tellurium
C07G Compounds of unknown constitution
C07H Sugars; Derivatives thereof; Nucleosides;Nucleotides; Nucleic acids
C07J Steroids
C07K Peptides
C07M Indexing scheme associated with subclasses C07B to K, relating to specific properties of organic compounds
C08 ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICALWORKING-UP;COMPOSITIONS BASED THEREON
C08B Polysaccharides; Derivatives thereofC08C Treatment or chemical modification of rubbers
C08F Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
C08G Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
C08H Derivatives of natural macromolecular compounds
C08J Working-up; General processes of compounding;After-treatment not covered by subclasses C08B, C, F, G
C08K Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08L Compositions of macromolecular compounds
C09 DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; MISCELLANEOUS COMPOSITIONS; MISCELLANEOUS APPLICATIONS OFMATERIALS
C09B Organic dyes or closely-related compounds for producing dyes; Mordants; LakesC09C Treatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties; Preparation of carbon black
C09D Coating compositions, e.g. paints, varnishes,lacquers; Filling pastes; Chemical paint or ink removers; Inks; Correcting fluids; Woodstains;Pastes or solids for colouring or printing; Use of materials therefor
C09F Natural resins; French polish; Drying-oils; Driers;Turpentine
C09G Polishing compositions other than french polish;Ski waxes
C09H Preparation of glue or gelatine
C09J Adhesives; Adhesive processes in general;Adhesive processes not provided for elsewhere;Use of materials as adhesives
C09K Materials for miscellaneous applications, not provided for elsewhere
C10 PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE;FUELS; LUBRICANTS; PEAT
C10B Destructive distillation of carbonaceous materials for production of gas, coke, tar, or similar materialsC10C Working-up tar, pitch, asphalt, bitumen;Pyroligneous acid
C10F Drying or working-up of peat
C10G Cracking hydrocarbon oils; Production of liquid hydrocarbon mixtures, e.g. by destructive hydrogenation, oligomerisation, polymerisation;Recovery of hydrocarbon oils from oil-shale, oilsand,or gases; Refining mixtures mainly consisting of hydrocarbons; Reforming of naphtha; Mineral waxes
C10H Production of acetylene by wet methods
C10J Production of producer gas, water-gas, synthesis gas from solid carbonaceous material, or mixtures containing these gases; Carburetting air or other gases
C10K Purifying or modifying the chemical compositions of combustible gases containing carbon monoxide
C10L Fuels not otherwise provided for; Natural gas;Synthetic natural gas obtained by processes not covered by subclasses C10G, K; Liquefied petroleum gas; Adding materials to fuels or fires to reduce smoke or undesirable deposits or to facilitate soot removal; Fire-lighters
C10M Lubricating compositions; Use of chemical substances either alone or as lubricating ingredients in a lubricating composition
C10N Indexing scheme associated with subclass C 10M
C11 ANIMAL OR VEGETABLE OILS, FATS,FATTY SUBSTANCES ORWAXES; FATTY ACIDS THEREFROM; DETERGENTS;CANDLES
C11B Producing, refining or preserving fats, fatty substances, fatty oils or waxes, including extraction from waste materials; Essential oils;PerfumesC11C Fatty acids from fats, oils or waxes; Candles; Fats,oils or fatty acids by chemical modification of fats,oils, or fatty acids obtained therefrom
C11D Detergent compositions; Use of single substances as detergents; Soap or soap-making; Resin soaps;Recovery of glycerol
C12 BIOCHEMISTRY; BEER; SPIRITS;WINE;VINEGAR; MICROBIOLOGY;ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
C12F Recovery of by-products of fermented solutions;Denaturing of, or denatured, alcoholC12G Wine; Other alcoholic beverages; Preparation thereof
C12H Pasteurisation, sterilisation, preservation,purification, clarification, ageing of alcoholic beverages or removal of alcohol therefrom
C12J Vinegar; Its preparation
C12L Pitching or depitching machines; Cellar tools
C12M Apparatus for enzymology or microbiology
C12N Micro-organisms or enzymes; Compositions thereof; Propagating, preserving, or maintaining micro-organisms; Mutation or genetic engineering;Culture media
C12P Fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture
C12Q Measuring or testing processes involving enzymes or micro-organisms; Compositions or test papers therefor; Processes of preparing such compositions; Condition-responsive control in microbiological or enzymological processes
C12R Indexing scheme associated with subclasses C12C to Q or S, relating to micro-organisms
C12S Processes using enzymes or micro-organisms to liberate, separate or purify a pre-existing compound or composition; Processes using enzymes or micro-organisms to treat textiles or to clean solid surfaces of materials249
C13 SUGAR INDUSTRY
C13C Cutting mills; Shredding knives; Pulp pressesC13D Production or purification of sugar juices
C13F Preparation or processing of raw sugar, sugar, or syrup
C13G Evaporation apparatus; Boiling pans
C13J Extraction of sugar from molasses
C13K Glucose; Invert sugar; Lactose; Maltose; Synthesis of sugars by hydrolysis of di- or polysaccharides
C14 SKINS; HIDES; PELTS; LEATHER
C14B Mechanical treatment or processing of skins,hides, or leather in general; Pelt-shearing machines; Intestine-splitting machinesC14C Chemical treatment of hides, skins or leather,e.g. tanning, impregnating, finishing; Apparatus therefor; Compositions for tanning
Subsection: METALLURGY
C21 METALLURGY OF IRON
C21B Manufacture of iron or steelC21C Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steel; Treatment in molten state of ferrous alloys
C21D Modifying the physical structure of ferrous metals;General devices for heat treatment of ferrous or non-ferrous metals or alloys; Making metal malleable by decarburisation, tempering, or other treatments
C22 METALLURGY; FERROUS OR NONFERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22B Production or refining of metals; Pretreatment of raw materialsC22C Alloys
C22F Changing the physical structure of non-ferrous metals or non-ferrous alloys
C23 COATINGMETALLIC MATERIAL;COATINGMATERIALWITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OFMETALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
C23C Coating metallic material; Coating material with metallic material; Surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; Coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in generalC23D Enamelling of, or applying a vitreous layer to,metals
C23F Non-mechanical removal of metallic material from surfaces; Inhibiting corrosion of metallic material;Inhibiting incrustation in general; Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23and at least one process covered by subclass C21Dor C22F or class C 25
C23G Cleaning or de-greasing of metallic material by chemical methods other than electrolysis
C25 ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
C25B Electrolytic or electrophoretic processes for the production of compounds or non- metals;Apparatus thereforC25C Processes for the electrolytic production, recovery or refining of metals; Apparatus therefor
C25D Processes for the electrolytic or electrophoretic production of coatings; Electroforming; Joining workpieces by electrolysis; Apparatus therefor
C25F Processes for the electrolytic removal of materials from objects; Apparatus therefor
