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. 30, 2017
Filed:
Feb. 13, 2013
Applicant:
Upm-kymmene Corporation, Helsinki, FI;
Inventors:
Annikki Vehniäinen, Helsinki, FI;
Markus Nuopponen, Helsinki, FI;
Pentti Pirkonen, Jyvaskyla, FI;
Martina Lille, Vantaa, FI;
Hannu Mursunen, Kangashakki, FI;
Assignee:
UPM-KYMMENE CORPORATION, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 11/18 (2006.01); D21C 9/18 (2006.01); C08B 15/02 (2006.01); D21H 15/02 (2006.01);
U.S. Cl.
CPC ...
C08B 15/02 (2013.01); D21C 9/18 (2013.01); D21H 11/18 (2013.01); D21H 15/02 (2013.01); Y10T 428/2982 (2015.01);
Abstract
A method for concentrating fibril cellulose including subjecting aqueous fibril cellulose at a concentration of not higher than 5% to pressure filtration where water is removed from the fibril cellulose by applying pressure to the aqueous fibril cellulose, and continuing the pressure filtration continued to an end point where over 50% of the water initially present is removed from the fibril cellulose. The pressure filtration is performed at a temperature of 30° C. or higher.