ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,600, issued on May 13, was assigned to Stora Enso OYJ (Helsinki).
"Fluff pulp" was invented by Helena Tufvesson (Gavle, Sweden), Marianne Konig (Stockholm), Gunilla Soderstam (Stockholm) and Antonina Munguia-Chang (Gavle, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention is directed to fluff pulp having a Kappa number in the range of from 5 to 18 and having, when in the form of a dry sheet, ISO brightness in the range of from 30 to 60% and having a specific volume in the dry defibrated state of at least 19 dm3/kg and having absorption time in the range of from 2 to 4 seconds."
The patent was filed on Sept. 3, 2020, under A...