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:
Jan. 23, 2018
Filed:
Oct. 12, 2015
Applicants:
Solenis Technologies, L.p., Schaffhausen, CH;
Upm-kymmene Corporation, Helsinki, FI;
Inventors:
John C. Harrington, Newark, DE (US);
Kate Marritt Lusvardi, Chadds Ford, PA (US);
Fushan Zhang, Hockessin, DE (US);
Assignee:
Solenis Technologies, L.P., , CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/25 (2006.01); D21H 17/43 (2006.01); D21H 21/10 (2006.01); D21H 17/44 (2006.01); D21H 17/42 (2006.01); D21H 23/04 (2006.01); D21H 17/00 (2006.01); D21H 17/45 (2006.01); D21H 17/37 (2006.01); D21H 11/18 (2006.01); D21H 17/38 (2006.01);
U.S. Cl.
CPC ...
D21H 17/25 (2013.01); D21H 3/00 (2013.01); D21H 11/18 (2013.01); D21H 17/37 (2013.01); D21H 17/375 (2013.01); D21H 17/38 (2013.01); D21H 17/42 (2013.01); D21H 17/43 (2013.01); D21H 17/44 (2013.01); D21H 17/45 (2013.01); D21H 17/72 (2013.01); D21H 21/10 (2013.01); D21H 23/04 (2013.01);
Abstract
A method of increasing the drainage performance of a pulp slurry during the manufacture of paper products by adding (a) at least one microfibrillated cellulose and (b) at least one associative polymer or at least one branched or crosslinked copolymer to the pulp slurry. This addition occurs before the dewatering step where the pulp slurry is formed into a fibrous mat.