ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,927, issued on June 30, was assigned to Mondi AG (Vienna).
"Hot extraction paper" was invented by Elisabeth Schwaiger (St. Stefan, Austria) and Paulus Goess (Klagenfurt, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A water vapour-permeable and hot water-resistant paper made substantially of cellulose and of manufacturing additives required for cellulose production, such as pH-value adjusting agents based on acids and/or bases, the paper exclusively contains cellulose with fibre lengths of at least 2.0 mm as a length-weighted mean, in particular of at least 2.5 mm as a length-weighted mean, wherein the cellulose forming the paper is a cellu...