CPC Main Group
C09B 29/00 Monoazo dyes prepared by diazotising and coupling
Filing statistics
CPC C09B 29/00 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
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