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. 22, 1987
Filed:
Apr. 10, 1985
Applicant:
Inventors:
Horst Harnisch, Much, DE;
Edgar Siegel, deceased, late of Leverkusen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
252600 ; 8102 ; 8568 ; 8566 ; 8606 ; 568924 ; 568931 ;
Abstract
To quench the fluorescence produced by anionic fluorescent brighteners use is made of virtually colorless, water-soluble cationic or amphoteric compounds which contain in the molecule at least one ammonium group, at least two aryl, arylene, hetaryl and/or hetarylene groups and at least one nitro group.