ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,827, issued on April 15, 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 inhibiting sticking between the films while maintaining excellent water solubility and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated using a diamond prism is Fd1 and a crystallinity index calculated using a germanium prism is Fg1 for FT-IR mea...