CPC Main Group
C09B 57/00 Other synthetic dyes of known constitution
13 direct subcodes
Child Classifications
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- C09B 57/02 Coumarine dyes
- C09B 57/04 Isoindoline dyes
- C09B 57/06 Naphtholactam dyes
- C09B 57/08 Naphthalimide dyes; Phthalimide dyes
- C09B 57/10 Metal complexes of organic compounds not being dyes in uncomplexed form
- C09B 57/12 Perinones, i.e. naphthoylene-aryl-imidazoles
- C09B 57/14 Benzoxanthene dyes; Benzothioxanthene dyes
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