CPC Subgroup Additional Only
C09C 2200/20 Interference pigments comprising a layer with a concentration gradient or a gradient of the refractive index
Full Title
Compositional and structural details of pigments exhibiting interference colours > Interference pigments comprising a layer with a concentration gradient or a gradient of the refractive index
3 direct subcodes
Child Classifications
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- C09C 2200/202 of sub-stoichiometric inorganic compounds
- C09C 2200/205 of coloured inorganic materials
- C09C 2200/207 of carbonaceous material, e.g. carbon black, graphite or SWNT
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