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:
Mar. 09, 1982
Filed:
Nov. 23, 1979
Applicant:
Inventor:
Karl H Hermann, Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C09B / ; C09B / ; C07D / ;
U.S. Cl.
CPC ...
260388 ; 260390 ; 260391 ; 260393 ; 260315 ; 2603 / ; 2603268 ; 544-1 ; 544106 ; 544184 ;
Abstract
In order to prepare basic dyestuffs of the general formula ##STR1## in which A and B independently of one another represent a hetero-aromatic radical or a radical of the general formula ##STR2## in which Ar denotes the grouping ##STR3## in which Y represents hydrogen or a non-ionic substituent and
Hermann, Karl. (1982). Process for the preparation of basic dyestuffs (U.S. Patent No. 4318859). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4318859
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile