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:
Jul. 20, 1993
Filed:
Feb. 21, 1990
Applicant:
Inventors:
Gerhard Back, Lorrach, DE;
Alois Puntener, Rheinfelden, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ;
U.S. Cl.
CPC ...
534602 ; 534696 ; 534699 ; 534698 ;
Abstract
A process is described for the preparation of pure, asymmetric 1:2 chromium complex dyes containing at least two groups which impart solubility in water, which process comprises reacting a mixture of two dyes of the formulae
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Back, Gerhard. (1993). Preparation of 1:2 chromium complexes one sulfo substituted and one (U.S. Patent No. 5229502). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5229502
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile