This list has the IPC codes from the 7th edition of the IPC manual that have been used by CAS for guaranteed coverage.
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A: HUMAN NECESSITIES
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| A01N | Biocides, pesticides, herbicides, and plant growth regulators | 27/00-61/02, 65/02 |
| A21D | Baking additives and preservatives | 2/02-2/32 |
| A23D | Edible oils or fats, e.g. margarines, cooking oils and shortenings | 7/005-7/01, 9/007, 9/013 |
| A23L | Miscellaneous food preparation and preservation | 3/34-3/3409, 3/3427-3/3436, 3/3454-3/3463, 3/3481-3/3562, 3/358, 3/37, 3/42 |
| A24B | Manufacture and preparation of tobacco | 15/00-15/20, 15/26-15/42 |
| A61K | Medical, dental and toilet preparations | 6/00-6/10, 7/16-7/24, 7/28-7/38, 9/107-9/113, 9/28-9/46, 9/56-9/66, 31/00-33/44, 37/00-38/58, 47/00-47/44, 47/48, 51/00-123/00 |
| A61L | Sterilization, disinfection and deodorization | 9/02, 15/12, 15/22-15/34, 15/38 |
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B: PERFORMING OPERATIONS; TRANSPORTING
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| B01D | Separation | 3/12, 7/02, 9/00-15/08, 53/48-53/72, 53/86, 53/90, 53/94, 59/00-61/04, 61/14-61/16, 61/36-61/44, 61/56-61/58, 65/06-65/08, 71/00-71/82, 111/00-157/10, 161/00-187/00 |
| B01F | Mixing, dissolving, emulsifying or dispersing | 17/00-17/56 |
| B01J | Chemical or physical processes | 10/00-10/02, 12/00-12/02, 13/14-13/18, 14/00-16/00, 19/14-19/16, 20/00-47/12, 101/00-105/98 |
| B03D | Flotation and differential sedimentation | 1/002-1/018 |
| B09C | Reclamation of contaminated soil | 1/08 |
| B22C | Foundry molding | 1/00-3/02 |
| B22F | Manufacture and working of metallic powder | 1/00-1/02 |
| B23K | Soldering, welding, cladding or plating by applying heat locally | 103/00-103/24 |
| B27K | Staining, dyeing, impregnation and bleaching of wood and similar materials | 3/15-3/42, 3/50-3/52 |
| B29K | Molding material indexing scheme associated with processing subclasses B29B, C or D | 1/00-19/00, 23/00-103/08, 105/16-105/18, 105/22, 201/00-711/14 |
| B32B | Layered products | 23/20-23/22, 25/14-27/42 |
| B41M | Printing and copying | 5/132-5/155, 5/28-5/32 |
| B82B | Nanostructures: manufacture and treatment | all groups |
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C: CHEMISTRY; METALLURGY
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| C01B | Nonmetallic elements and their compounds | all groups |
| C01C | Ammonia, cyanogen and their compounds | all groups |
| C01D | Alkali metal compounds | all groups |
| C01F | Compounds of Be, Mg, Al, Ca, Sr, Ba, Ra, Th or the rare earth metals | all groups |
| C01G | Compounds containing metals covered by C01D or C01F | all groups |
| C02F | Treatment of water, wastewater, sewage or sludge | 1/28, 1/42-1/469, 1/50-1/72, 1/76-1/78, 5/00-5/14, 9/08, 11/14 |
| C03B | Manufacture, shaping or supplementary processes for glass, mineral or slag wool | 8/00-8/04, 37/014-37/018 |
| C03C | Chemical compositions and surface treatment of glass, mineral or slag wool | 00/00-25/06, 25/24-25/48, 25/66 |
| C04B | Lime, magnesia, cements, ceramics, and refractories | 00/00-7/345, 7/60-16/12, 22/00-103/50, 103/54-103/69, 111/10-111/28 |
| C05B | Phosphate fertilizers | all groups |
| C05C | Nitrogen fertilizers | all groups |
| C05D | Inorganic fertilizers | all groups |
| C05G | Fertilizer mixtures | all groups |
| C06B | Explosives or thermic compositions | 23/00-49/00 |
| C06C | Detonating or priming devices, fuses, chemical lighters and pyrophoric compositions | 15/00 |
| C06D | Smoke or mist generation, gas-attack compositions and gas generation for blasting or propulsion | all groups |
| C06F | Matches and their manufacture | 3/00-3/08 |
| C07B | General methods and apparatus for organic chemistry | all groups |
| C07C | Acyclic or carbocyclic compounds | all groups |
| C07D | Heterocyclic compounds | all groups |
| C07F | Acyclic, carbocyclic or heterocyclic compounds containing elements other than C, H, halogen, O, N, Se or Te | all groups |
| C07G | Compounds of unknown constitution | all groups |
| C07H | Sugars and their derivatives, nucleosides, nucleotides and nucleic acids | all groups |
| C07J | Steroids | all groups |
| C07K | Peptides | all groups |
| C07M | Indexing scheme associated with subclasses C07B to K | all groups |
| C08B | Polysaccharides and derivatives | all groups |
| C08C | Treatment or chemical modification of rubbers | all groups |
| C08F | Macromolecular compounds obtained by reactions only involving C-to-C unsaturated bonds | all groups |
| C08G | Macromolecular compounds obtained otherwise than by reactions only involving C-to-C unsaturated bonds | all groups |
| C08H | Derivatives of natural macromolecular compounds | all groups |
| C08J | Work-up, compounding and after-treatment | all groups |
| C08K | Inorganic or non-macromolecular compounding ingredients | all groups |
| C08L | Compositions of macromolecular compounds | all groups |
| C09B | Organic dyes and mordants | all groups |
| C09C | Treatment of inorganic materials to enhance their pigmenting or filling properties | all groups |
| C09D | Coating compositions, inks, lacquers, etc. | all groups |
| C09F | Natural resins | all groups |
| C09G | Polishing compositions | all groups |
| C09H | Preparation of glue or gelatin | 00/00, 3/00-7/00 |
| C09J | Adhesives | 00/00, 1/00-4/06, 9/00-201/10 |
| C09K | Materials for miscellaneous applications | 00/00, 5/00-15/32, 17/02, 17/06-17/08, 17/12-17/30, 17/36-21/14 |
| C10C | Work-up of tar, pitch, asphalt or bitumen | 1/08-1/12, 1/20, 3/02-3/04, 5/00 |
| C10G | Petrochemistry | 00/00-7/10, 9/00-9/02, 9/06, 9/34-9/38, 11/00-21/28, 25/00-71/00, 73/00-75/04 |
| C10H | Production of acetylene by wet methods | all groups |
| C10J | Production of fuel gases | 1/00-3/70 |
| C10K | Purifying or modifying CO-containing combustible gas | all groups |
| C10L | Fuels | 00/00-5/40, 7/00-11/04 |
| C10M | Lubricating compositions | all groups |
| C10N | Indexing scheme associated with subclass C10M | 00/00-20/04, 30/00-30/20, 40/26-40/28, 60/00-80/00 |
| C11B | Animal and vegetable oils, fats and waxes and essential oils for perfumes | all groups |
| C11C | Fatty acids and chemical modification of fats, oils or fatty acids | 00/00-3/14 |
| C11D | Detergent compositions and soaps | 00/00-15/04, 19/00 |
| C12F | Recovery of byproducts of fermented solutions | 00/00, 3/00-3/04, 5/00 |
| C12G | Wine and other alcoholic beverages | 1/022, 1/04, 1/10-1/12, 3/12 |
| C12H | Pasteurization, sterilization, preservation, purification, etc., of alcoholic beverages | 1/04-1/056, 1/10, 1/14-1/15, 3/00-3/04 |
| C12J | Vinegar and its preparation | 00/00-1/06, 1/10 |
| C12N | Microorganisms and enzymes | 1/08, 1/11, 1/13, 1/15, 1/19, 1/21-1/32, 1/38, 5/10-5/28, 7/01, 7/06, 9/00-11/18, 15/00-15/90 |
| C12P | Fermentation for synthesis or separation of isomers | all groups |
| C12Q | Enzyme- and microorganism-based measuring or testing methods | 1/25-1/62, 1/66-1/68 |
| C12S | Enzyme- and microorganism-based processes for liberation, separation or purification of compounds | 1/00-1/02, 3/02-3/04, 3/08, 3/14-3/20, 5/00 |
| C13D | Production or purification of sugar juices | 3/00-3/18 |
| C13J | Extraction of sugar from molasses | all groups |
| C13K | Glucose, invert sugar, lactose, maltose and sugar synthesis by hydrolysis of di- or polysaccharides | all groups |
| C14C | Chemical treatment of skins, hides and leather and tanning compositions | all groups |
| C21B | Manufacture or iron and steel | 3/00-3/06, 5/00-5/04, 15/00-15/04 |
| C21C | Processing or pig iron | 1/02-1/04, 5/06, 5/36, 5/54, 7/04-7/076 |
| C21D | Metallurgy of ferrous metals | 1/56-1/613, 1/72-1/76, 3/00-5/00, 5/04-6/04 |
| C22B | Production and refining of ferrous and nonferrous metals | 00/00-1/248, 3/00-9/187, 9/20-61/00 |
| C22C | Alloys | 00/00-47/10, 47/14-47/18, 49/00-121/02 |
| C22F | Metallurgy of nonferrous metals and alloys | all groups |
| C22K | Indexing scheme associated with subclasses C21D, C22C or C22F | all groups |
| C23C | Coating and surface treatment of metallic materials | 2/00-2/12, 4/04-4/10, 8/00-14/48, 14/54, 14/58-16/455, 16/46-16/48, 16/458, 16/52-30/00 |
| C23D | Enamelling or vitreous layer application to metals | 1/00-7/00, 11/00 |
| C23F | Surface treatment or corrosion and incrustation inhibition of metallic materials | 00/00-1/06, 1/10-13/16, 14/00-17/00 |
| C23G | Chemical cleaning or degreasing of metallic materials | 00/00-1/36, 5/00-5/06 |
| C25B | Electrolytic or electrophoretic processes for production of compounds or nonmetals | 1/00-7/00, 9/06-9/16, 11/00-13/08, 15/08 |
| C25C | Electrolytic production, recovery or refining of metals | 00/00-3/06, 3/12, 3/18, 3/24-5/04, 7/08 |
| C25D | Electrolytic and electrophoretic processes for production of coatings and electroforming | 1/12-1/22, 3/00-5/56, 9/00-13/10, 13/18, 13/20, 13/24, 15/00-15/02, 19/00, 21/11, 21/14-21/22 |
| C25F | Electrolytic removal of materials from objects | 00/00-5/00 |
| C30B | Crystal growth | 00/00-13/12, 13/34-15/04, 17/00-19/04, 23/00-23/02, 23/08-25/06, 28/00-29/58, 31/00-31/08 |
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D. TEXTILES; PAPER
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| D01C | Chemical treatment of natural filamentary or fibrous material to obtain filaments or fibers for spinning | 00/00-1/02, 3/00-5/00 |
| D01F | Chemical features in manufacture of artificial fibers and filaments | 00/00-9/127, 9/14-13/04 |
| D06L | Bleaching, dry cleaning or washing of fibers and fabrics | all groups |
| D06M | Miscellaneous textile and fiber treatment | 00/00, 10/04-11/83, 13/00-13/517, 14/00-15/693, 16/00-19/00, 101/00-101/40 |
| D06N | Covering materials for walls, floors and roofs | 00/00, 3/00-3/14, 3/18 |
| D06P | Dyeing or printing of textiles, leathers, furs or macromolecular materials | 00/00-5/17, 5/22-7/00 |
| D21C | Cellulose production and pulping liquor regeneration | 00/00-1/08, 3/00-3/20, 9/10-9/16, 11/00-11/14 |
| D21H | Pulp compositions and impregnating or coating of paper | 00/00-11/06, 11/20-13/50, 17/03-17/74, 19/10-19/70, 19/80-19/82, 21/14-21/38 |
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F: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| F28D | Heat-exchange apparatus in which the heat-exchange media do not come into direct contact | 15/00-15/04 |
| F28F | Details of heat-exchange or heat-transfer apparatus | 21/02, 21/06-21/08 |
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G: PHYSICS
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| G01N | Analyzing materials by determining their chemical and physical properties | 27/48-27/49, 31/00-31/22, 33/15, 33/50-33/553, 33/561-33/567, 33/573, 33/58-33/98 |
| G03C | Photosensitive materials and processes in photography | 1/00-1/015, 1/035-1/735, 1/76, 1/77-1/775, 1/79-1/795, 1/815-1/89, 1/93, 5/20-5/26, 5/30-5/58, 7/00-7/02, 7/25-7/44, 8/00-8/28, 8/32, 8/36-8/38, 8/52-8/56 |
| G03F | Photomechanical production of textured or patterned surfaces | 7/004-7/085 |
| G03G | Electrography and electrophotography | 5/06-5/08, 5/09, 7/00-11/00 |
| G21C | Nuclear reactors | 3/42-3/64, 19/42-19/50 |
| G21G | Conversion of chemical elements and radioactive sources | 00/00-1/12 |
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H: ELECTRICITY
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| Class/Subclass | Subject Matter | Groups Guaranteed Coverage |
| H01B | Cables, conductors, insulators and dielectrics | 1/00-3/56 |
| H01C | Resistors | 7/108-7/118 |
| H01F | Magnetic materials and inductors | 1/00-1/02, 1/032-1/44, 10/00, 10/08-10/30 |
| H01G | Capacitors | 9/022-9/038, 9/042, 9/045 |
| H01J | Electric discharge tubes or discharge lamps | 1/142-1/148, 19/062-19/068, 61/14-61/22 |
| H01M | Processes or means (e.g., batteries) for direct conversion of chemical energy into electrical energy | 4/24-4/60, 4/86-6/00, 6/04-6/06, 6/14-6/20, 6/24-6/28, 8/06-8/22 |