ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,468, issued on Dec. 16, was assigned to SEKISUI CHEMICAL Co. Ltd. (Osaka, Japan).
"Polyvinyl acetal resin" was invented by Takayuki Maeda (Shiga, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a polyvinyl acetal resin that has an excellent dispersing property and enables the production of a formed article having high mechanical strength. Provided is a polyvinyl acetal resin having a water absorption per unit area of 2 mg/cm2 or greater and 50 mg/cm2 or less when formed into a film having a thickness of 10 micro metre."
The patent was filed on Sept. 24, 2021, under Application No. 18/026,648.
*For further inform...