DIFF Main Group
C09K 3/00 Materials not provided for elsewhere
Introduced: September 1968
IPC and CPC are identically structured here. All 10 subcodes exist in both systems.
5 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C09K 3/10 for sealing or packing joints or covers (filling pastes C09D5/34) +7 CPC IPC+CPC Available in IPC and CPC
- C09K 3/12 Materials for stopping leaks, e.g. in radiators, in tanks (filling pastes C09D5/34) IPC+CPC Available in IPC and CPC
- C09K 3/18 for application to surfaces to minimize adherence of ice, mist or water thereto (rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30); Thawing or antifreeze materials for application to surfaces (used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00) +1 CPC IPC+CPC Available in IPC and CPC
- C09K 3/20 as substitutes for glycerol in its non-chemical uses, e.g. as a base in toiletry creams or ointments IPC+CPC Available in IPC and CPC
- C09K 3/32 for absorbing liquids to remove pollution, e.g. oil, gasoline, fat since 1974 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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