ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,785, issued on Jan. 27, was assigned to NIPPON STEEL Corp. (Tokyo).
"Hot-rolled steel sheet" was invented by Hiroshi Shuto (Tokyo), Kazumasa Tsutsui (Tokyo), Koutarou Hayashi (Tokyo), Akifumi Sakakibara (Tokyo), Jun Ando (Tokyo) and Toshiki Sugiyama (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "This hot-rolled steel sheet has a predetermined chemical composition, in a microstructure, in terms of area %, residual austenite is less than 3.0%, ferrite is 15.0% or more and less than 60.0%, and pearlite is less than 5.0%, an E value that indicates periodicity of the microstructure is 10.7 or more, and an I value that indicates uniformity of the m...