logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5428138 B1

PDFFull Text
Date of Patent:
Jun. 27, 1995

Filed:

Feb. 08, 1993

Red 2,6-dicyanophenylazo dyes and the preparation and use thereof

Applicant:
Inventors:

Ulrich Buhler, Alzenau, DE;

Margareta Boos, Hattersheim, DE;

Reinhard Kuhn, Frankfurt am Main, DE;

Assignee:

Cassella AG, Frankfurt, DE;

Attorney:

Connolly & Hutz

Primary Examiner:

Mary C Lee

Assistant Examiner:

Fiona T Powers

Int. Cl.
CPC ...
C09B / ; D06P / ;
U.S. Cl.
CPC ...
534854 ; 534798 ; 534847 ; 534853 ;
Abstract

The azo dyes of the formula I ##STR1## where X.sup.1 is for example hydrogen or (C.sub.1 to C.sub.6)alkyl,

Find Patent Forward Citations

Loading…