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:
Jan. 15, 2013
Filed:
Jun. 10, 2009
Applicants:
Bernhard Hunke, Hennef, DE;
Michael Kraemer, Kürten, DE;
Andrei Tauber, Köln, DE;
Günter Klug, Langenfeld, DE;
Inventors:
Bernhard Hunke, Hennef, DE;
Michael Kraemer, Kürten, DE;
Andrei Tauber, Köln, DE;
Günter Klug, Langenfeld, DE;
Assignee:
Blankophor GmbH & Co. KG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 21/36 (2006.01); C07D 251/00 (2006.01); C09K 11/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A composition suitable for surface treatment of paper, wherein the composition contains a specified fluorescent whitening agent with alkylsulfonic acid groups, a salt of a bivalent cation, and a carrier. The composition is used for whitening paper, in particular in the size press.