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:
Dec. 03, 2019
Filed:
Mar. 18, 2016
Basf SE, Ludwigshafen, DE;
Frank Bachmann, Freiburg, DE;
Christian Cremer, Loerrach, DE;
Beate Froehling, Neustadt, DE;
Bryan Patrick Murphy, Cincinnati, OH (US);
Guiru Zhang, Cincinnati, OH (US);
Peter Marte Torgerson, Washington Courthouse, OH (US);
BASF SE, Ludwigshafen, DE;
Abstract
The invention relates to cationic direct dyes of the formula I (1), wherein m and n are independently from each other 0 or 1, D is an aromatic or a cationic heteroaromatic group, which are further specified, K is an aromatic or heteroaromatic group, Eand Eare independently from each other ═CH— or ═N—, An is an anion and a is a number from 1 to 6 and Rand Rare independently from each other and further specified. The compounds show washfastness at hair-dying.