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:
Sep. 28, 2021
Filed:
Jul. 16, 2020
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Kaisa Karisalmi, Helsinki, FI;
Tom Lundin, Åbo, FI;
Mikko Virtanen, Helsinki, FI;
Antti Laukkanen, Helsinki, FI;
Jason McKee, Helsinki, FI;
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 11/18 (2006.01); D21H 11/12 (2006.01); D21H 17/21 (2006.01); D21H 17/33 (2006.01); D21H 21/20 (2006.01); D21H 21/18 (2006.01); C08L 1/02 (2006.01);
U.S. Cl.
CPC ...
D21H 11/18 (2013.01); D21H 11/12 (2013.01); D21H 17/21 (2013.01); D21H 17/33 (2013.01); D21H 21/18 (2013.01); D21H 21/20 (2013.01); C08L 1/02 (2013.01);
Abstract
The invention relates to a method for producing paper, board or the like. The method comprises obtaining a thick stock comprising cellulose fibres, forming a fibrous web and drying of drying the fibrous web. A strength agent system, which comprises at least one synthetic or natural polymer, or their mixture, and microfibrillated parenchymal cellulose material originating from non-wood sources, is added to the thick stock. The invention relates also to paper or board produced by the method.