US Patent Issued to MICROWORKS on Nov. 3 for "Polyester film and packaging material" (South Korean Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,779,831, issued on Nov. 3, was assigned to MICROWORKS Co. LTD. (Iwol-myeon, South Korea).

"Polyester film and packaging material" was invented by Seokin Lee (Suwon-si, South Korea) and Kweon Hyung Han (Suwon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polyester film includes a laminate including a plurality of first layers and a plurality of second layers alternately stacked on the plurality of first layers. Each of the first layers includes lactic acid residues, and each of the second layers includes terephthalate residues and adipic acid residues. The polyester film has an average equivalent noise level of 78 dB or less from a nois...