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:
Sep. 08, 1992
Filed:
May. 13, 1991
Applicant:
Inventors:
Kurt Weber, Basel, CH;
Claude Eckhardt, Riedisheim, FR;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562 87 ; 544107 ; 544410 ; 546184 ; 548354 ; 548579 ; 358413 ; 562 83 ; 562 84 ;
Abstract
Distyrylbiphenyl compounds of formula ##STR1## wherein R.sub.1, R.sub.3, R.sub.6 and R.sub.7 are halogen, hydrogen, C.sub.1 -C.sub.4 alkyl or cyano, and M.sup..sym. is a salt-forming cation, are used as fluorescent whitening agents in solid and, preferably, liquid, detergent compositions. They are distinguished by good white effects and insignificant spotting behavior.