CPC Main Group
C09B 57/00 Other synthetic dyes of known constitution
Filing statistics
CPC C09B 57/00 belongs to the parent subclass C09B, which recorded 29,807 patent applications worldwide between 2013 and 2023. Annual filings declined from 3,030 in 2013 to 1,785 in 2023 (-41%), peaking at 3,329 applications in 2017. The most active applicants in class C09 are LG CHEM (7,954 applications), HALLIBURTON ENERGY SERVICES GROUP (6,584 applications) and NITTO DENKO CORPORATION (6,500 applications).
Source: EPO PATSTAT, worldwide filings
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