C09B 43/22 having the carboxylic group directly attached to an aromatic carbocyclic ring
Introduced: January 1980
Title
Titles differ between systems:
IPC: having the carboxyl group directly attached to an aromatic carbocyclic ring
CPC: having the carboxylic group directly attached to an aromatic carbocyclic ring
Full Title
Full titles differ between systems:
Preparation of azo dyes from other azo compounds > by acylation of hydroxy groups > with monocarboxylic acids, carbamic acid esters or halides, monoisocyanates or haloformic acid esters > having the carboxyl group directly attached to an aromatic carbocyclic ring
Preparation of azo dyes from other azo compounds > by acylation of hydroxyl group > with monocarboxylic acids, carbamic acid esters or halides, mono- isocyanates or haloformic acid esters > having the carboxylic group directly attached to an aromatic carbocyclic ring
No child classifications to compare. This is a leaf node in both IPC and CPC.
Top Applicants
Top Applicants (IPC)
Class C09,2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 6,420
- NITTO DENKO CORPORATION JP 5,752
- HALLIBURTON ENERGY SERVICES GROUP US 5,650
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
- DOW GLOBAL TECHNOLOGIES US 4,844
- MERCK PATENT DE 4,779
- CHINESE ACADEMY OF SCIENCES 4,311
- FUJIFILM JP 4,205
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931
Top Applicants (CPC)
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