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PCE
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DIFF Subgroup
C09B 11/12

without any OH group bound to an aryl nucleus

Introduced: September 1968

Title

Titles differ between systems:

IPC: without any —OH group bound to an aryl nucleus

CPC: without any OH group bound to an aryl nucleus

Full Title

Full titles differ between systems:

IPC:

Diaryl- or triarylmethane dyes > derived from triarylmethanes > Amino derivatives of triarylmethanes > without any —OH group bound to an aryl nucleus

CPC:

Diaryl- or thriarylmethane dyes > derived from triarylmethanes > Amino derivatives of triarylmethanes > without any OH group bound to an aryl nucleus

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • C09B 11/14 Preparation from aromatic aldehydes, aromatic carboxylic acids or derivatives thereof and aromatic amines IPC+CPC Available in IPC and CPC
  • C09B 11/16 Preparation from diarylketones or diarylcarbinols IPC+CPC Available in IPC and CPC
  • C09B 11/18 Preparation by oxidation IPC+CPC Available in IPC and CPC
  • C09B 11/20 Preparation from other triarylmethane derivatives 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