ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,884, issued on Jan. 13, was assigned to NIPPON STEEL Corp. (Tokyo).
"Hot-rolled steel sheet" was invented by Mitsuru Yoshida (Tokyo), Hiroshi Shuto (Tokyo), Kazumasa Tsutsui (Tokyo) and Koutarou Hayashi (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 less than 15.0%, and pearlite is less than 5.0%, an E value that indicates periodicity of the microstructure is less than 10.7, and an I value that indicates uniformity of the microstructure is less than 1.020, a standard deviation of a Mn ...