CPC Main Group
C09B 49/00 Sulfur dyes
6 direct subcodes
Child Classifications
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- C09B 49/02 from nitro compounds of the benzene, naphthalene or anthracene series
- C09B 49/04 from amino compounds of the benzene, naphthalene or anthracene series
- C09B 49/06 from azines, oxazines, thiazines or thiazoles
- C09B 49/08 from urea derivatives
- C09B 49/10 from diphenylamines, indamines, or indophenols
- C09B 49/12 from other compounds
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