C09B31/26 - CPC Classification Index

ClassID:

102144 ⎘

C09B31/26 - CPC Classification

Classification description:

Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling; Trisazo dyes from other coupling components "D"

Sub-classes:

C09B31/28 » Heterocyclic compounds 22

Recent Application in this class:

20220098412

2022-03-31

Dichroic azo-azomethine dyes for liquid crystal compositions

20190382586

2019-12-19

COMPOSITION, DICHROIC SUBSTANCE, LIGHT ABSORPTION ANISOTROPIC FILM, LAMINATE, AND IMAGE DISPLAY DEVICE

20170335110

2017-11-23

Black trisazo dyes, their preparation and their use

20130269124

2013-10-17

Azo dyes