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:
Jun. 24, 2025
Filed:
Mar. 04, 2021
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Kimmo Strengell, Helsinki, FI;
Asko Karppi, Espoo, FI;
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21H 17/55 (2006.01); D21H 17/37 (2006.01); D21H 17/42 (2006.01); D21H 17/44 (2006.01); D21H 21/20 (2006.01); D21H 23/04 (2006.01);
U.S. Cl.
CPC ...
D21H 17/55 (2013.01); D21H 17/375 (2013.01); D21H 17/42 (2013.01); D21H 17/44 (2013.01); D21H 21/20 (2013.01); D21H 23/04 (2013.01);
Abstract
The invention relates to a composition and method for manufacture of paper, board, tissue or the like. The composition comprises an amphoteric polymer component, which has a weight average molecular weight of at least 600 000 g/mol, preferably at least 1 000 000 g/mol, more preferably at least 2 000 000 g/mol, and at least one synthetic cationic polymer component, which is a copolymer of a polyamidoamine and has a weight average molecular weight ≤550 000 g/mol, preferably ≤500 000 g/mol, more preferably ≤400 000 g/mol and dispersity index more than 15, preferably more than 20, more preferably more than 25.