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:
Jan. 11, 1977
Filed:
Nov. 26, 1975
Applicant:
Inventors:
David Melville Fawkes, Manchester, EN;
John Lindley Leng, Manchester, EN;
Assignee:
Imperial Chemical Industries Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260155 ; 260305 ; 260158 ;
Abstract
Azo dyestuffs devoid of carboxylic acid and sulphonic acid groups and of the formula I ##STR1## wherein A is the residue of 1,3 or 1,4-benzodioxan ring structure fused to the thiazole ring via the benzene ring, B is the residue of a para-coupling amine or an indole, R is an optionally substituted alkyl, alkenyl, cycloalkyl or aralkyl radical and X is an anion. The dyestuffs are useful for the colorization of synthetic polymeric materials particularly polyacrylonitrile and copolymers thereof.