ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,328, issued on Nov. 3, was assigned to NIPPON STEEL STAINLESS STEEL Corp. (Tokyo).
"Austenitic stainless steel and spring" was invented by Kotaro Sekimukai (Tokyo) and Kazunari Imakawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An austenitic stainless steel consists of 0.010 to 0.200% by mass of C, 2.00% by mass or less of Si, 3.00% by mass or less of Mn, 0.035% by mass or less of P, 0.0300% by mass or less of S, 6.00 to 14.00% by mass of Ni, 20.0 to 26.0% by mass of Cr, 3.00% by mass or less of Mo, 0.01 to 3.00% by mass of Cu, 1.000% by mass of less of Ti, 0.200% by mass or less of Al, 0.1000% by mass or less of Ca, 0.100 to 0.250% by mas...