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PCE
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IPC Subgroup
C09B 43/124

with monocarboxylic acids, carbamic esters or halides, monoisocyanates, or haloformic acid esters

Introduced: January 1980

Last revised: January 2006

Full Title

Preparation of azo dyes from other azo compounds > by acylation of amino groups > with monocarboxylic acids, carbamic esters or halides, monoisocyanates, or haloformic acid esters

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
Subclass:
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; MORDANTS; LAKES

2 direct subcodes

Child Classifications

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  • C09B 43/128 Aliphatic, cycloaliphatic or araliphatic acids
  • C09B 43/132 having the carboxyl group directly attached to an aromatic carbocyclic ring

Top Applicants

Top 10 applicants by patent filingsfor 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