CPC Main Group
C09B 29/00 Monoazo dyes prepared by diazotising and coupling
10 direct subcodes
Child Classifications
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- C09B 29/02 from diazotised o-amino-hydroxy compounds
- C09B 29/06 from coupling components containing amino as the only directing group
- C09B 29/10 from coupling components containing hydroxy as the only directing group
- C09B 29/24 from coupling components containing both hydroxyl and amino directing groups
- C09B 29/32 from coupling components containing a reactive methylene group
- C09B 29/34 from other coupling components
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