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. 11, 1990
Filed:
Sep. 12, 1989
Applicant:
Inventors:
Johannes P Dix, Neuhofen, DE;
Guenter Hansen, Ludwigshafen, DE;
Hellmut Kast, Bobenheim-Boxheim, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ;
U.S. Cl.
CPC ...
8527 ; 8538 ; 8594 ; 8654 ; 8657 ; 8659 ; 8609 ; 8610 ; 8611 ; 8927 ;
Abstract
Concentrated solutions of cationic dyes are prepared by treating the cationic dyes, which contain as the counterions the anions customarily present during their preparation, with alkali metal salts of monocarboxylic acids and with or without complexing agents in an aqueous glycol ether medium, and separating off the organic phase, which contains the dyes in the form of their monocarboxylic acid salts.
Dix, Johannes. (1990). Preparation of concentrated solutions of cationic dyes as (U.S. Patent No. 4976744). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4976744
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile