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:
Mar. 28, 2017
Filed:
Mar. 07, 2014
Applicant:
Kemira Oyj, Helsinki, FI;
Inventor:
Mikko Virtanen, Helsinki, FI;
Assignee:
KEMIRA OYJ, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 17/28 (2006.01); D21H 17/63 (2006.01); D21H 17/69 (2006.01); D21H 21/10 (2006.01); D21H 21/18 (2006.01); D21H 17/37 (2006.01); D21H 17/68 (2006.01);
U.S. Cl.
CPC ...
D21H 17/28 (2013.01); D21H 17/375 (2013.01); D21H 17/63 (2013.01); D21H 17/68 (2013.01); D21H 17/69 (2013.01); D21H 21/10 (2013.01); D21H 21/18 (2013.01);
Abstract
The invention relates to a process for production of paper or board comprising providing a stock comprising cellulose fibers, adding a mixture comprising microfibrillated cellulose and a strength additive to the stock, adding a microparticle to the stock after the addition of said mixture, dewatering the stock on a wire to form a web, and drying the web.