CPC Subgroup
C09B 1/36 Dyes with acylated amino groups
Full Title
Dyes with anthracene nucleus not condensed with any other ring > Amino-anthraquinones > Preparation from starting materials already containing the anthracene nucleus > Dyes with acylated amino groups
8 direct subcodes
Child Classifications
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- C09B 1/38 Urea and thiourea derivatives
- C09B 1/40 the acyl groups being residues of an aliphatic or araliphatic carboxylic acid
- C09B 1/42 the acyl groups being residues of an aromatic carboxylic acid
- C09B 1/44 the acyl groups being residues of a heterocyclic carboxylic acid
- C09B 1/46 the acyl groups being residues of cyanuric acid or an analogous heterocyclic compound
- C09B 1/473 the acyl groups being residues of a sulfonic acid
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