ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,085, issued on Oct. 14, was assigned to NIPPON STEEL Corp. (Tokyo).
"Surface-treated steel sheet" was invented by Atsuo Shimizu (Tokyo), Ikumi Tokuda (Tokyo), Hiromasa Shoji (Tokyo) and Koji Akioka (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "This surface-treated steel sheet includes: a steel sheet; a Zn-based plating layer formed on the steel sheet; and a coating formed on the Zn-based plating layer, in which a Si concentration, a P concentration, a F concentration, a V concentration, a Zr concentration, a Zn concentration, and an Al concentration of the coating are, by mass %, Si: 10.00% to 25.00%, P: 0.01% to 5.00%, F: 0.01% to 2.00%, V:...