ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,111, issued on Aug. 12, was assigned to NIPPON STEEL Corp. (Tokyo).
"Hot stamped steel" was invented by Takuya Mitsunobu (Tokyo), Kohei Tokuda (Tokyo), Takehiro Takahashi (Tokyo) and Hiroshi Takebayashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hot stamped steel includes a base material that is formed of steel, a plated layer that is formed on a surface of the base material, and a phosphate coating that is formed on a surface of the plated layer; chemical composition of the plated layer contains 20.00 to 45.00 mass % of Al, 10.00 to 45.00 mass % of Fe, 4.50 to 15.00 mass % of Mg, 0.10 to 3.00 mass % of Si, 0.05 to 3.00 mass % of Ca, an...