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:
Nov. 18, 2014
Filed:
Sep. 06, 2012
Applicants:
Fredrik Solhage, Borås, SE;
Joakim Carlén, Göteborg, SE;
Birgitta Johansson, Nödinge, SE;
Inventors:
Assignee:
Akzo Nobel N.V., Arnhem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/24 (2006.01); D21H 17/29 (2006.01); D21H 17/66 (2006.01); D21H 17/68 (2006.01); D21H 21/10 (2006.01); D21H 17/00 (2006.01); D21H 23/18 (2006.01); D21H 17/37 (2006.01); D21H 17/45 (2006.01); D21H 17/43 (2006.01);
U.S. Cl.
CPC ...
D21H 17/74 (2013.01); D21H 17/66 (2013.01); D21H 23/18 (2013.01); D21H 17/375 (2013.01); D21H 21/10 (2013.01); D21H 17/455 (2013.01); D21H 17/29 (2013.01); D21H 17/68 (2013.01); D21H 17/43 (2013.01);
Abstract
The present invention relates to a process for producing paper which comprises: providing an aqueous suspension comprising cellulosic fibers, adding to the suspension, after all points of high shear, a cationic polysaccharide; an inorganic polymer P1 being a cationic polyaluminium compound; and a polymer P2 being an anionic polymer; and, dewatering the obtained suspension to form paper.