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:
Mar. 12, 2013
Filed:
Aug. 28, 2009
Torsten Klein, Speyer, DE;
Christian Jehn-rendu, Shanghai, CN;
Hans-georg Lemaire, Limburgerhof, DE;
Oliver Koch, Wachenheim, DE;
Torsten Klein, Speyer, DE;
Christian Jehn-Rendu, Shanghai, CN;
Hans-Georg Lemaire, Limburgerhof, DE;
Oliver Koch, Wachenheim, DE;
BASF SE Ludwigshafen, , DE;
Abstract
A process for the production of paper, board and cardboard by draining a paper stock on a wire in the presence of at least one cationic polymeric retention aid and/or retention aid system with sheet formation and drying of the sheets, wherein an endo-β-1,4-glucanase is metered in an amount of from 0.00001 to 0.01% by weight, based on the dry paper stock, into the paper stock before the addition of the at least one cationic polymeric retention aid and/or retention aid system.