ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,416, issued on March 31, was assigned to Stora Enso OYJ (Helsinki).
"Biobased barrier film for packaging material" was invented by Isto Heiskanen (Imatra, Finland), Kaj Backfolk (Lappeenranta, Finland) and Katja Lyytikainen (Imatra, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a biobased barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate layer and a coating layer disposed on at least one surface of the substrate layer, wherein said substrate layer has a grammage in the range of 1-60 g/m2 and comprises at least 50 wt % of highly refined cellulose pulp ...