C09B31/04 - CPC Classification Index

ClassID:

102113 ⎘

C09B31/04 - 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; Disazo dyes from a coupling component "C" containing a directive amino group

Sub-classes:

C09B31/041 » {containing acid groups, e.g. -COH, -SOH, -POH, -OSOH, -OPOH; Salts thereof} 1
C09B31/043 » Amino-benzenes 40
C09B31/053 » Amino naphthalenes 7

Recent Application in this class:

20180030354

2018-02-01

Composition

20130333123

2013-12-19

Disazo dyes, preparation and use

20110177315

2011-07-21

Dichroic dye composition, light absorption anisotropic film, and polarizing element