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:
Aug. 26, 2025
Filed:
Mar. 04, 2021
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Ville Nyman, Espoo, FI;
Anneli Lepo, Espoo, FI;
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21H 21/16 (2006.01); B32B 29/00 (2006.01); B32B 29/08 (2006.01); D21H 11/14 (2006.01); D21H 17/26 (2006.01); D21H 17/28 (2006.01); D21H 23/22 (2006.01); D21H 27/30 (2006.01);
U.S. Cl.
CPC ...
D21H 21/16 (2013.01); B32B 29/005 (2013.01); B32B 29/08 (2013.01); D21H 11/14 (2013.01); D21H 17/26 (2013.01); D21H 17/28 (2013.01); D21H 23/22 (2013.01); D21H 27/30 (2013.01); B32B 2250/26 (2013.01); B32B 2255/12 (2013.01); B32B 2255/24 (2013.01); B32B 2307/718 (2013.01);
Abstract
The invention relates to the use of a surface size composition comprising at least one cellulose derivative selected from cellulose ethers, excluding carboxyalkyl celluloses, for providing compression strength for a fibrous web, such as paper, board or the like, preferably comprising recycled cellulosic fibres. The invention relates also to a method for surface sizing of paper, board or the like.