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:
Aug. 02, 1977
Filed:
Dec. 05, 1975
Applicant:
Inventor:
Denis Robert Ridyard, Manchester, EN;
Assignee:
Imperial Chemical Industries Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
260190 ; 260191 ;
Abstract
A disazo dyestuff has the formula ##STR1## wherein the sulphonic acid group in ring A is in meta or para position relative to the hydroxy group and E represents ##STR2## The dyestuff gives navy blue to violet shades on synthetic polyamide textile materials.