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:
Apr. 23, 1985
Filed:
May. 10, 1983
Kenneth Anderton, Lancashire, GB;
Nigel Hall, Lancashire, GB;
Brian Parton, Lancashire, GB;
Andrew H Renfrew, Lancashire, GB;
Malcolm G Shaw, Stirlingshire, GB;
Imperial Chemical Industries PLC, London, GB;
Abstract
A dyestuff of formula: ##STR1## wherein: the groups X.sub.1 and X.sub.2 are independently hydrogen, halogen, alkyl, aryl, alkoxy, cyano, optionally substituted amino or carboxylic acid ester groups; (R).sub.n represents n substituents R each of which is independently halogen, lower alkyl, lower alkoxy or --COOH and n is 0 or 1; R.sub.1 is hydrogen, or optionally substituted lower alkyl; Y is an optionally substituted aliphatic or optionally substituted araliphatic group; R.sub.2 is hydrogen, optionally substituted lower alkyl, optionally substituted aryl or optionally substituted aralkyl; R.sub.3 is hydrogen or an optionally substituted alkyl or aralkyl group; A.sup.- is an anion; a is 0 or 1; and Z is hydrogen, optionally substituted lower alkyl, optionally substituted aryl or optionally substituted aralkyl. The dyes are useful for the coloration of materials such as textiles, leather, inks and lacquers.