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. 10, 1985
Filed:
Oct. 23, 1980
Applicant:
Inventors:
Alfred Fasciati, Bottmingen, CH;
Arthur Buhler, Rheinfelden, CH;
Assignee:
Ciba Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ; D06P / ; D06P / ;
U.S. Cl.
CPC ...
534641 ; 534591 ; 534734 ; 534797 ; 534817 ;
Abstract
The invention provides novel symmetrical and unsymmetrical disazo dyes which in the form of the free acid have the formula I ##STR1## wherein each R independently of the other represents hydrogen or an alkyl group of 1 to 4 carbon atoms,