ALEXANDRIA, Va., June 12 -- United States Patent no. 12,295,820, issued on May 13, was assigned to The Procter & Gamble Co. (Cincinnati).
"Absorbent core having swelling chamber" was invented by Bruno Johannes Ehrnsperger (Bad Soden, Germany), Christine Elisabeth Zipf (Lauda-Konigshofen, Germany) and Andrea Peri (Kronberg, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An absorbent article includes a liquid permeable topsheet, a liquid impermeable backsheet, an absorbent core being disposed between the topsheet and the backsheet, wherein the absorbent core includes an absorbent material disposed in an absorbent deposition area and enclosed in a core wrap. The core further includes a first swelling ch...