ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,163, issued on June 2, was assigned to NIPPON STEEL Corp. (Tokyo).
"Steel sheet for gas soft nitriding" was invented by Masafumi Azuma (Tokyo), Shinya Saitoh (Tokyo) and Eisaku Sakurada (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "This steel sheet for gas soft nitriding has a predetermined chemical composition and metallographic structure, in which, when a sheet thickness is indicated as t, a sheet width, which is a width in a direction perpendicular to a rolling direction, is indicated as w, and effective grain sizes are measured at seven positions of w/8, w/4, 3w/8, w/2, 5w/8, 3w/4, and 7w/8 in a width direction from an end portion in the ...