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. 25, 1979
Filed:
Nov. 14, 1977
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
25230124 ; 25230122 ; 548241 ; 546119 ; 542462 ; 542463 ;
Abstract
Novel stilbene compounds of the formula ##STR1## in which A is the radical ##STR2## in which R.sub.1 is hydrogen or chlorine and R.sub.2 is hydrogen or alkyl, Z is hydrogen, chlorine or phenyl and R.sub.3 is hydrogen, alkyl or chlorine, as well as their use in a process for optically brightening organic material are described.