US Patent Issued to NIPPON STEEL Chemical & Material, KUKDO CHEMICAL on Aug. 5 for "Active ester resin, method for producing thereof, epoxy resin composition, cured product thereof, prepreg, laminated board, and material for circuit substrate" (South Korean, Japanese Inventors)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,354, issued on Aug. 5, was assigned to NIPPON STEEL Chemical & Material Co. Ltd. (Tokyo) and KUKDO CHEMICAL Co. LTD. (Seoul, South Korea).

"Active ester resin, method for producing thereof, epoxy resin composition, cured product thereof, prepreg, laminated board, and material for circuit substrate" was invented by Masahiro Soh (Tokyo), Kazuo Ishihara (Tokyo), Jin Soo Lee (Seoul, South Korea), Chan Ho Park (Seoul, South Korea) and Joong Hwi Jee (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "To provide an epoxy resin composition that exhibits excellent low-dielectric properties and that is excellent in copper foil peel strength and ...