ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,802, issued on March 18, was assigned to NIPPON STEEL Corp. (Tokyo).
"Surface-treated steel sheet" was invented by Kosuke Kawamoto (Tokyo), Yasuto Goto (Tokyo), Yuta Dairokuno (Tokyo) and Koki Shimada (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A surface-treated steel sheet of the present disclosure includes a steel sheet, and an alloy layer containing Ni and Co on a surface of the steel sheet. A surface roughness Ra1 of the surface of the alloy layer over a sampling length of 5.0 mm in the width direction of the steel sheet is 2.0 micro metre or less. Ra2 that denotes the arithmetic mean height of a roughness curve of the surface of the ...