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:
May. 04, 1976
Filed:
Jan. 23, 1974
Applicant:
Inventor:
Werner Fringeli, Basel, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ; 162162 ; 25230123 ; 427158 ;
Abstract
The present invention provides new bis-s-triazinylamino-stilbene-2,2'-disulphonic acids of the formula ##SPC1## And the alkali metal, alkaline earth metal, earth metal, ammonium or amine salt thereof. The new compounds are valuable optical brighteners, especially for whitening paper in combination with the surface finishing.