IPC Classification

Class code (prefix) Descriptions Number of results
C01B Non-metallic elements; compounds thereof
C01C 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 or
C02F Treatment of water, waste water, sewage, or sludge
C03B Manufacture or shaping of glass, or of mineral or slag wool; supplementary processes in the manufacture or shaping of glass, or of mineral or slag wool
C03C Chemical composition of glasses, glazes or vitreous enamels; surface treatment of glass; surface treatment of fibres or filaments made from glass, minerals or slags; joining glass to glass or other materials
C04B Lime; magnesia; slag; cements; compositions thereof, e.g. mortars, concrete or like building materials; artificial stone; ceramics; refractories; treatment of natural stone
C05B Phosphatic fertilisers
C05C Nitrogenous fertilisers
C05D Inorganic fertilisers not covered by subclasses , ; fertilisers producing carbon dioxide
C05F Organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
C05G Mixtures of fertilisers covered individually by different subclasses of class ; mixtures of one or more fertilisers with additives not having a specific fertilising activity; fertilisers characterised by their form
C06B Explosive or thermic compositions; manufacture thereof; use of single substances as explosives
C06C 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 (chemical part)
C06F Matches; manufacture of matches
C07B General methods of organic chemistry; apparatus therefor
C07C 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
C08B Polysaccharides; derivatives thereof
C08C 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 , , , or
C08K Use of inorganic or non-macromolecular organic substances as compounding ingredients
C08L Compositions of macromolecular compounds
C09B Organic dyes or closely-related compounds for producing dyes; mordants; lakes
C09C 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 or 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 (siccatives); turpentine
C09G Polishing compositions; ski waxes
C09H Preparation of glue or gelatine
C09J Adhesives; non-mechanical aspects of adhesive processes in general; adhesive processes not provided for elsewhere; use of materials as adhesives
C09K Materials for applications not otherwise provided for; applications of materials not otherwise provided for
C10B Destructive distillation of carbonaceous materials for production of gas, coke, tar, or similar materials
C10C 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, oil-sand, or gases; refining mixtures mainly consisting of hydrocarbons; reforming of naphtha; mineral waxes
C10H Production of acetylene by wet methods
C10J Production of gases containing carbon monoxide and hydrogen from solid carbonaceous materials by partial oxidation processes involving oxygen or steam ; carburetting air or other gases
C10K Purifying or modifying the chemical composition of combustible gases containing carbon monoxide
C10L Fuels not otherwise provided for; natural gas; synthetic natural gas obtained by processes not covered by subclasses  or  ; liquefied petroleum gas;  use of additives to fuels or fires;  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
C11B Producing, e.g. by pressing raw materials or by extraction from waste materials, refining or preserving fats, fatty substances, e.g. lanolin, fatty oils or waxes; essential oils; perfumes
C11C Fatty acids obtained from fats, oils or waxes; candles; fats, oils or fatty acids obtained by chemical modification of fats, oils or fatty acids
C11D Detergent compositions; use of single substances as detergents; soap or soap-making; resin soaps; recovery of glycerol
C12C Beer; preparation of beer by fermentation; preparation of malt for making beer; preparation of hops for making beer
C12F Recovery of by-products of fermented solutions; denatured alcohol; preparation thereof
C12G Wine; preparation thereof; alcoholic beverages; preparation of alcoholic beverages not provided for in subclasses or
C12H Pasteurisation, sterilisation, preservation, purification, clarification or ageing of alcoholic beverages; methods for altering the alcohol content of fermented solutions or alcoholic beverages
C12J Vinegar; preparation or purification thereof
C12L Pitching or depitching machines; cellar tools
C12M Apparatus for enzymology or microbiology
C12N Microorganisms or enzymes; compositions thereof; propagating, preserving, or maintaining microorganisms; 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, nucleic acids or microorganisms; compositions or test papers therefor; processes of preparing such compositions; condition-responsive control in microbiological or enzymological processes
C12R Indexing scheme associated with subclasses , relating to microorganisms
C12S Processes using enzymes or micro-organisms to liberate, separate or purify a pre-existing compound or composition (biological treatment of water, waste water, or sewage C02F 3/00, of sludge C02F 11/02; processes using enzymes or micro-organisms to separate optical isomers from a racemic mixture C12P 41/00); processes using enzymes or micro-organisms to treat textiles or to clean solid surfaces of materials
C13B Production of sucrose; apparatus specially adapted therefor
C13K Saccharides obtained from natural sources or by hydrolysis of naturally occurring disaccharides, oligosaccharides or polysaccharides
C14B Mechanical treatment or processing of skins, hides, or leather in general; pelt-shearing machines; intestine-splitting machines
C14C Treating skins, hides or leather with chemicals, enzymes or microorganisms, e.g. tanning, impregnating or finishing; apparatus therefor; compositions for tanning
C21B Manufacture of iron or steel
C21C 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, e.g. by decarburisation or tempering
C22B Production or refining of metals; pretreatment of raw materials
C22C Alloys
C22F Changing the physical structure of non-ferrous metals or non-ferrous alloys
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 general
C23D 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 and at least one process covered by subclass  or or class
C23G Cleaning or de-greasing of metallic material by chemical methods other than electrolysis
C25B Electrolytic or electrophoretic processes for the production of compounds or non- metals; apparatus therefor
C25C 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
C30B Single-crystal growth ; unidirectional solidification of eutectic material or unidirectional demixing of eutectoid material; refining by zone-melting of material ; production of a homogeneous polycrystalline material with defined structure ; single crystals or homogeneous polycrystalline material with defined structure; after-treatment of single crystals or a homogeneous polycrystalline material with defined structure ; apparatus therefor
C40B Combinatorial chemistry; libraries, e.g. chemical libraries
C99Z Subject matter not otherwise provided for in this section