ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,336, issued on May 20, was assigned to Essity Hygiene and Health Aktiebolag (Gothenburg, Sweden).
"Ply fibrous product" was invented by Ulrika Husmark (Gothenburg, Sweden) and Frida Ryttsen (Gothenburg, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ply fibrous product comprises at least one ply selected from a nonwoven ply and a tissue paper ply, wherein the at least one ply selected from a nonwoven ply and a tissue paper ply comprises cellulosic fibers comprising an organic polycarboxylic acid and wherein the organic polycarboxylic acid has at least one carboxyl group covalently bound to the cellulosic fibers and at least one free carboxy...