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:
Nov. 02, 1999
Filed:
Oct. 07, 1997
Applicant:
Inventors:
Peter Rohringer, Schonenbuch, CH;
Rainer Hans Traber, Reinach, CH;
Peter Ruf, Molndal, SE;
Thomas Engelhardt, Rheinfelden, DE;
Karla Ann Wilzer, Greensboro, NC (US);
Assignee:
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25230121 ; 25230123 ; 25220132 ; 162 72 ; 162 76 ; 1062873 ; 106499 ; 106503 ;
Abstract
Disclosed are dispersions of fluorescent whitening agents which are suitable for the fluorescent whitening of coating compositions for coating paper or of fibre dispersions (paper pulps) in paper production.