US 7,341,607 B2Granted

Yellow anionic disazo dyes

AssigneeCiba Specialty Chemicals Corporation

InventorsMichael Lennartz, Adolf Käser, Sandra Weiss

Life of this patent

Estimating the term…

Abstract

The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.

Claims7

Dependent claims

A compound of the formula

Dependencies are inferred from the claim text.

Facts

Application: 10/517,410Filed 27 May 2003
Priority: EP 024054566 Jun 2002
Published: US 2005/0172420 A111 Aug 2005
Granted: 11 Mar 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

C07C 309/51
Containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton: at least one of the nitrogen atoms being part…
C09B 35/023
Characterised by two coupling components of the same type: in which the coupling component is a hydroxy or polyhydroxy compound
C09B 35/03
Characterised by two coupling components of the same type: in which the coupling component is a heterocyclic compound
C09B 35/033
Characterised by two coupling components of the same type: in which the coupling component is an arylamide of an o-hydroxy-carboxylic acid or of a…

Family

US 2005/0172420 A1Pre-grant publication · published 11 Aug 2005
US 7,341,607 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

patentgrep

Loading patent…

patentgrepSearch patents

Back to results