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PCE
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DIFF Subgroup
C09B 43/32

by reacting carboxylic or sulfonic groups, or derivatives thereof, with amines; by reacting keto-groups with amines

Introduced: January 1980

Title

Titles differ between systems:

IPC: by reacting carboxyl or sulfonic groups, or derivatives thereof, with amines; by reacting keto groups with amines

CPC: by reacting carboxylic or sulfonic groups, or derivatives thereof, with amines; by reacting keto-groups with amines

Full Title

Full titles differ between systems:

IPC:

Preparation of azo dyes from other azo compounds > by reacting carboxyl or sulfonic groups, or derivatives thereof, with amines; by reacting keto groups with amines

CPC:

Preparation of azo dyes from other azo compounds > by reacting carboxylic or sulfonic groups, or derivatives thereof, with amines; by reacting keto-groups with amines

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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  • C09B 43/325 CPC only CPC only
  • C09B 43/34 by reacting ortho- or peri-dicarboxylic dyes since 1980 IPC+CPC Available in IPC and CPC
  • C09B 43/36 with amino-anthracene or amino-anthraquinone dyes since 1980 IPC+CPC Available in IPC and CPC
  • C09B 43/38 by reacting two or more ortho-hydroxy naphthoic acid dyes with polyamines since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C09,2013–2023, worldwide · Source: EPO PATSTAT

  1. LG CHEM KR 6,420
  2. NITTO DENKO CORPORATION JP 5,752
  3. HALLIBURTON ENERGY SERVICES GROUP US 5,650
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
  5. DOW GLOBAL TECHNOLOGIES US 4,844
  6. MERCK PATENT DE 4,779
  7. CHINESE ACADEMY OF SCIENCES 4,311
  8. FUJIFILM JP 4,205
  9. BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
  10. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931

Top Applicants (CPC)

Class C09,2013–2023, worldwide · Source: EPO PATSTAT

  1. LG CHEM KR 7,954
  2. HALLIBURTON ENERGY SERVICES GROUP US 6,584
  3. NITTO DENKO CORPORATION JP 6,500
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
  5. DOW GLOBAL TECHNOLOGIES US 6,324
  6. FUJIFILM JP 5,832
  7. MERCK PATENT DE 5,481
  8. BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
  9. SAMSUNG DISPLAY KR 5,105
  10. NITTO DENKO CORPORATION 3,584