ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,064, issued on Feb. 10, was assigned to Stora Enso OYJ (Helsinki).
"Multiply containerboard for use in corrugated board" was invented by Isto Heiskanen (Imatra, Finland) and Jukka Kankkunen (Imatra, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a multiply containerboard for use in corrugated board, said multiply containerboard comprising: a first outer ply, a second outer ply, and at least one intermediate ply sandwiched between the first and second outer ply, wherein said first and second outer ply comprise at least 70 wt % neutral sulfite semi chemical (NSSC) pulp based on dry weight, and wherein said inte...