ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,527,686, issued on Jan. 20, was assigned to HISAMITSU PHARMACEUTICAL Co. INC. (Tosu, Japan).
"Cooling sheet" was invented by Kentaro Nakashima (Tosu, Japan), Keiichiro Tsurushima (Tosu, Japan) and Takaaki Yoshinaga (Tosu, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cooling sheet comprising: a backing layer; an adhesive agent layer; and a liner layer for protecting the adhesive agent layer, wherein the adhesive agent layer contains water at 65 to 85% by mass based on a total mass of the adhesive agent layer, polyalkylene glycol monooleate at 0.12 to 0.7% by mass based on the total mass of the adhesive agent layer, polyvinyl alcohol at 3 to 10%...