US Patent Issued to Stora Enso on March 25 for "Method for applying starch to a paper or paperboard web" (Finnish Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,715, issued on March 25, was assigned to Stora Enso OYJ (Helsinki).

"Method for applying starch to a paper or paperboard web" was invented by Kaj Backfolk (Villmanstrand, Finland), Isto Heiskanen (Imatra, Finland) and Johanna Lyytikainen (Lappeenranta, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for applying starch to a paper or paperboard web, the method comprising the steps of: providing an aqueous suspension comprising starch particles and at least 1 wt %, based on the dry solid content of the suspension, of an amphiphilic polymer, creating a foam of the aqueous suspension, and applying the foam to th...