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DIFF Subgroup
C09B 5/24

the heterocyclic rings being condensed with an anthraquinone nucleus in 1-2 or 2-3 position

Introduced: September 1968

Title

Titles differ between systems:

IPC: the heterocyclic ring(s) being condensed with an anthraquinone nucleus in 1-2 or 2-3 position

CPC: the heterocyclic rings being condensed with an anthraquinone nucleus in 1-2 or 2-3 position

Full Title

Full titles differ between systems:

IPC:

Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings > the heterocyclic ring(s) being condensed with an anthraquinone nucleus in 1-2 or 2-3 position

CPC:

Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings > the heterocyclic rings being condensed with an anthraquinone nucleus in 1-2 or 2-3 position

Of 7 combined children, 6 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • C09B 5/30 1,2 azoles of the anthracene series IPC+CPC Available in IPC and CPC
  • C09B 5/32 1.3 azoles of the anthracene series IPC+CPC Available in IPC and CPC
  • C09B 5/42 Pyridino anthraquinones 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