CPC Subgroup
C09B 11/12 without any OH group bound to an aryl nucleus
Full Title
Diaryl- or thriarylmethane dyes > derived from triarylmethanes > Amino derivatives of triarylmethanes > without any OH group bound to an aryl nucleus
4 direct subcodes
Child Classifications
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- C09B 11/14 Preparation from aromatic aldehydes, aromatic carboxylic acids or derivatives thereof and aromatic amines
- C09B 11/16 Preparation from diarylketones or diarylcarbinols
- C09B 11/18 Preparation by oxidation
- C09B 11/20 Preparation from other triarylmethane derivatives
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