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:
May. 18, 1976
Filed:
Apr. 22, 1974
James Nairn Greenshields, Manchester, EN;
George Hull, Manchester, EN;
Bernard Tury, Manchester, EN;
Imperial Chemical Industries Limited, London, EN;
Abstract
Dyeing shaped articles made of polyacrylonitrile, copolymers or blends thereof, with cationic dyestuffs characterised in that the dyeing is carried out in the presence of a quaternary ammonium compound of the formula: ##EQU1## wherein R.sup.1, R.sup.2 and R.sup.3 represent alkyl or alkenyl groups and R.sup.4 represents an alkyl group or hydrogen, at least one of said groups R.sup.1, R.sup.2, R.sup.3 and R.sup.4 having at least eight and not more than eighteen carbon atoms and the remainder from 1 to 4 carbon atoms, X represents an anion, Y represents hydrogen or methyl and n is zero or an average of from 1-30.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile