ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,893, issued on Aug. 12, was assigned to TOYOBO Co. LTD. (Osaka, Japan).
"Biaxially oriented polyester film" was invented by Masayuki Haruta (Inuyama, Japan) and Norimi Tabota (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "To provide a biaxially oriented polyester film that has extremely low content of antimony, excellent hygiene, few foreign substances, excellent transparency and heat resistance, and is excellent in printability, workability, and productivity. A biaxially oriented polyester film characterized by a content of antimony in the film of 10 ppm or less, a content of phosphorus in the film of 25 ppm or more and 75 ppm or less...