C09K MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
Description
C09K covers materials and compositions designed for specialized applications that do not fit into more specific chemical or industrial classifications within the C section. This subclass encompasses diverse functional materials including heat transfer fluids, lubricants, drilling fluids, de-icing compositions, and materials for optical, electrical, or thermal applications. The classification serves as a residual category for chemical formulations and material systems where the primary technical function or application area falls outside established pigment, paint, adhesive, or natural resin classifications, allowing inventors to classify innovations in emerging material technologies and niche industrial applications.
24 direct subcodes
Child Classifications
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- C09K 11/00 Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K 13/00 Etching, surface-brightening or pickling compositions (for glass C03C15/00, ; for metallic material C23F, C23G1/00, C25F1/00; )
- C09K 15/00 Anti-oxidant compositions; Compositions inhibiting chemical change ( , in foodstuffs A21D, A23, , in macromolecular compositions C08; in liquid fuels or lubricants C10; in fats, fatty substances, fatty oils or waxes C11B5/00; in detergents C11D; ; corrosion inhibiting compositions for metallic material C23F11/00)
- C09K 17/00 Soil-conditioning materials or soil-stabilising materials (specially adapted for boreholes or wells C09K8/00; fertilisers C05; consolidating by placing solidifying or pore-filling substances in the soil E02D3/12)
- C09K 19/00 Liquid crystal materials
- C09K 21/00 Fireproofing materials (for use in a particular application, see the relevant places, e.g. fireproofing of wood B27K, of polymers C08, of textiles D06M, of paper D21H; fireproof paints C09D5/18)
- C09K 2101/00 Agricultural use
- C09K 2103/00 Civil engineering use
- C09K 2105/00 Erosion prevention
- C09K 2107/00 Impermeabilisation
- C09K 2109/00 pH regulation
- C09K 2111/00 Perovskites, i.e. ABX3
- C09K 2113/00 Quantum dots
- C09K 2200/00 Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K 2205/00 Aspects relating to compounds used in compression type refrigeration systems
- C09K 2208/00 Aspects relating to compositions of drilling or well treatment fluids
- C09K 2211/00 Chemical nature of organic luminescent or tenebrescent compounds
- C09K 2219/00 Aspects relating to the form of the liquid crystal [LC] material, or by the technical area in which LC material are used
- C09K 23/00 Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
Top Applicants
Top 10 applicants by patent filingsfor class C09, 2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 7,954
- HALLIBURTON ENERGY SERVICES GROUP US 6,584
- NITTO DENKO CORPORATION JP 6,500
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
- DOW GLOBAL TECHNOLOGIES US 6,324
- FUJIFILM JP 5,832
- MERCK PATENT DE 5,481
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
- SAMSUNG DISPLAY KR 5,105
- NITTO DENKO CORPORATION 3,584