CPC Subgroup
C09B 44/10 containing cyclammonium groups attached to an azo group by a carbon atom of the ring system
Full Title
Azo dyes containing onium groups > containing cyclammonium groups attached to an azo group by a carbon atom of the ring system
10 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C09B 44/12 having one nitrogen atom as the only ring hetero atom
- C09B 44/14 1,2-Diazoles or hydrogenated 1,2-diazoles
- C09B 44/16 1,3-Diazoles or hydrogenated 1,3-diazoles
- C09B 44/18 having three nitrogen atoms as the only ring hetero atoms
- C09B 44/20 Thiazoles or hydrogenated thiazoles
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