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:
Aug. 23, 1988
Filed:
Aug. 27, 1986
Applicant:
Inventors:
Rudolf Zink, Therwil, CH;
Ian J Fletcher, Magden, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 586 ; 544 62 ; 544 74 ; 544 79 ; 544105 ; 544116 ; 544119 ; 544284 ; 544287 ; 544289 ;
Abstract
Chromogenic quinazolines of formula ##STR1## wherein R is an aryl radical or a heterocyclic radical,