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:
Apr. 15, 2014
Filed:
Sep. 17, 2010
Applicants:
Bernhard Hunke, Hennef, DE;
Andrei Tauber, Cologne, DE;
Michael Kraemer, Kuerten, DE;
Guenter Klug, Langenfeld, DE;
Inventors:
Bernhard Hunke, Hennef, DE;
Andrei Tauber, Cologne, DE;
Michael Kraemer, Kuerten, DE;
Guenter 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
Fluorescent whitening agent compositions include at least two specific disulfo-type fluorescent whitening agents for optically whitening paper or board.