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:
Oct. 01, 1991
Filed:
Nov. 22, 1988
Applicant:
Inventors:
Werner Fringeli, Laufen, CH;
Martin Jollenbeck, Solingen, DE;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ; C09K / ;
U.S. Cl.
CPC ...
8648 ; 25230121 ; 25230122 ; 25230123 ; 25230124 ; 25230123 ; 25230124 ; 8922 ;
Abstract
There are disclosed aqueous dispersions comprising water-insoluble or sparingly soluble fluorescent whitening agents, dispersants, further optional assistants and a copolymer of 2-vinylpyrrolidone and 3-vinylpropionic acid, their preparation and the use thereof for whitening textile fibre materials. These novel dispersions are storage-stable.