C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
Introduced: September 1968
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- Subclass:
- MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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.
Filing statistics
IPC subclass C09K recorded 265,496 patent applications worldwide between 2013 and 2023. Annual filings grew from 22,189 in 2013 to 22,283 in 2023 (+0%), peaking at 26,558 applications in 2018. The most active applicants in class C09 are LG CHEM (6,420 applications), NITTO DENKO CORPORATION (5,752 applications) and HALLIBURTON ENERGY SERVICES GROUP (5,650 applications).
Source: EPO PATSTAT, worldwide filings
Additional Content
Glossary
Materials material include compounds, compositions, mixtures and preparations
Limiting references
materials or their applications or uses for which entries are available elsewhere in IPC .
18 direct subcodes
Child Classifications
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- C09K 101/00 Agricultural use
- C09K 103/00 Civil engineering use
- C09K 105/00 Erosion prevention
- C09K 107/00 Impermeabilisation
- C09K 109/00 pH regulation
- C09K 11/00 Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K 111/00 Perovskites, i.e. ABX
- C09K 113/00 Quantum dots
- C09K 13/00 Etching, surface-brightening or pickling compositions
- C09K 15/00 Anti-oxidant compositions; Compositions inhibiting chemical change
- C09K 17/00 Soil-conditioning materials or soil-stabilising materials
- C09K 19/00 Liquid crystal materials
- C09K 21/00 Fireproofing materials
- C09K 23/00 Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K 3/00 Materials not provided for elsewhere
- C09K 5/00 Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K 8/00 Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K 9/00 Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
Top Applicants
Top 10 applicants by patent filingsfor class C09, 2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 6,420
- NITTO DENKO CORPORATION JP 5,752
- HALLIBURTON ENERGY SERVICES GROUP US 5,650
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
- DOW GLOBAL TECHNOLOGIES US 4,844
- MERCK PATENT DE 4,779
- CHINESE ACADEMY OF SCIENCES 4,311
- FUJIFILM JP 4,205
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931