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:
May. 24, 2016
Filed:
Nov. 22, 2013
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Chen Lu, Marietta, GA (US);
Scott Rosencrance, Douglasville, GA (US);
Danny Nguyen, Norcross, GA (US);
Assignee:
KEMIRA OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 11/00 (2006.01); D21H 17/43 (2006.01); D21H 17/37 (2006.01); D21H 17/41 (2006.01); D21H 21/10 (2006.01); D21H 21/18 (2006.01); D21H 21/20 (2006.01); D21H 23/04 (2006.01); D21H 23/22 (2006.01);
U.S. Cl.
CPC ...
D21H 17/43 (2013.01); D21H 17/375 (2013.01); D21H 17/41 (2013.01); D21H 21/10 (2013.01); D21H 21/18 (2013.01); D21H 21/20 (2013.01); D21H 23/04 (2013.01); D21H 23/22 (2013.01);
Abstract
The present invention provides a method for increasing paper strength in papermaking process comprising adding to a pulp a composition comprising an anionic polyacrylamide (APAM) and a high charge cationic glyoxylated polyacrylamide (GPAM). The present invention also provides paper obtained with said method.