C09B ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ; MORDANTS; LAKES (fermentation or enzyme using processes to synthesise a desired chemical compound C12P)
Description
C09B encompasses organic dyes and their precursor compounds, along with mordants and lake pigments used in coloring applications. This subclass covers azo dyes, anthraquinone dyes, triphenylmethane dyes, indigo and indigoid dyes, and other synthetic organic colorants derived through chemical synthesis. Mordants (chemical fixatives that enhance dye-fiber adhesion) and lakes (insoluble pigments formed by precipitating organic dyes with inorganic substrates) are included within this classification scope. C09B excludes natural dyes and their direct extraction (covered in C09C) and focuses on chemically synthesized or chemically modified colorant systems for textiles, printing, plastics, and other industrial applications.
Filing statistics
CPC subclass C09B recorded 29,807 patent applications worldwide between 2013 and 2023. Annual filings declined from 3,030 in 2013 to 1,785 in 2023 (-41%), peaking at 3,329 applications in 2017. The most active applicants in class C09 are LG CHEM (7,954 applications), HALLIBURTON ENERGY SERVICES GROUP (6,584 applications) and NITTO DENKO CORPORATION (6,500 applications).
Source: EPO PATSTAT, worldwide filings
44 direct subcodes
Child Classifications
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- C09B 1/00 Dyes with anthracene nucleus not condensed with any other ring
- C09B 11/00 Diaryl- or thriarylmethane dyes
- C09B 13/00 Oxyketone dyes
- C09B 15/00 Acridine dyes
- C09B 17/00 Azine dyes
- C09B 19/00 Oxazine dyes
- C09B 21/00 Thiazine dyes
- C09B 23/00 Methine or polymethine dyes, e.g. cyanine dyes
- C09B 25/00 Quinophthalones
- C09B 26/00 Hydrazone dyes; Triazene dyes
- C09B 27/00 Preparations in which the azo group is formed in any way other than by diazotising and coupling,
- C09B 29/00 Monoazo dyes prepared by diazotising and coupling
- C09B 3/00 Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
- C09B 31/00 Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
- C09B 33/00 Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
- C09B 35/00 Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
- C09B 37/00 Azo dyes prepared by coupling the diazotised amine with itself
- C09B 39/00 Other azo dyes prepared by diazotising and coupling
- C09B 41/00 Special methods of performing the coupling reaction
- C09B 43/00 Preparation of azo dyes from other azo compounds
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