US Patent Issued to Kemira on June 24 for "Composition and method for manufacture of paper, board or the like" (Finnish Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,579, issued on June 24, was assigned to Kemira Oyj (Helsinki).

"Composition and method for manufacture of paper, board or the like" was invented by Kimmo Strengell (Helsinki) and Asko Karppi (Espoo, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 polyamidoa...