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:
Aug. 30, 2011
Filed:
Sep. 29, 2005
Applicants:
Thomas Christopher Greschik, Gothenborg, SE;
Jan Nordin, Kvissleby, SE;
Hans-ake Baltsen, Varberg, SE;
Inventors:
Thomas Christopher Greschik, Gothenborg, SE;
Jan Nordin, Kvissleby, SE;
Hans-Ake Baltsen, Varberg, SE;
Assignee:
Akzo Nobel N.V., Arnhem, NL;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C 9/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to methods of modifying cellulose fibers and of producing paper which methods include providing a pulp suspension of cellulose fibers and adding a cellulose derivative during the bleaching of the cellulose fibers in an acidic bleaching stage.