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:
Dec. 30, 2014
Filed:
Mar. 22, 2012
Applicants:
Bernhard Hunke, Hennef, DE;
Andrei Tauber, Cologne, DE;
Michael Kraemer, Kurten, DE;
Günter Klug, Langenfeld, DE;
Inventors:
Bernhard Hunke, Hennef, DE;
Andrei Tauber, Cologne, DE;
Michael Kraemer, Kurten, DE;
Günter Klug, Langenfeld, DE;
Assignee:
Blankophor GmbH & Co. KG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21F 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a composition suitable for optically whitening paper or board, wherein the composition contains specified bis-triazinylamino-stilbene fluorescent whitening agents with carboxylic acid and/or sulfonic acid groups. The composition can be used for whitening paper in the pulp, size press or by coating.