C09B31/16 - CPC Classification Index

ClassID:

102139 ⎘

C09B31/16 - 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

Sub-classes:

C09B31/18 » from a coupling component "D" containing a directive amine group 11
C09B31/20 » from a coupling component"D" containing a directive hydroxyl group 14
C09B31/22 » from a coupling component "D" containing directive hydroxyl and amino groups 14
C09B31/24 » from a coupling component "D" containing reactive methylene groups 0
C09B31/26 » from other coupling components "D" 4

Recent Application in this class:

20110075076

Azo compounds, and dye-based polarizing films and polarizing plates comprising the same

20080257206

Dye-based black ink formulations and ink-jet ink sets

20080094549

Azo compounds and dye-type polarizing films or plates containing the same