ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,540, issued on July 29, was assigned to KURARAY Co. LTD. (Okayama, Japan).
"Water-soluble film and package" was invented by Minoru Okamoto (Okayama, Japan), Sayaka Shimizu (Okayama, Japan) and Osamu Kazeto (Okayama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a water-soluble film capable of maintaining good mechanical strength even when packaging a liquid detergent and the like while maintaining excellent water solubility of the water-soluble film and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated for a first surface is Fd1 and a ...