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.:
Date of Patent:
Nov. 01, 1977
Filed:
May. 13, 1976
Applicant:
Inventors:
Klaus Hunger, Kelkheim, Taunus, DT;
Friedrich Wilhelm Weingarten, Liederbach, Taunus, DT;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260203 ; 560 45 ;
Abstract
Diazotation of 3-amino-4-carboalkoxy-benzoic acid (4'-phenoxy)-anilides which may be halogenated in said phenoxy nucleus and coupling on 2-hydroxy-3-naphthoic acid-(4'-benzoylamino)-anilides which may be further substituted in said anilide nucleus by halogen, lower alkyl or lower alkoxy, yields azo compounds which are valuable pigments of clear shades and high fastness to migration, light and weather.