ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,373, issued on Nov. 3, was assigned to JFE STEEL Corp. (Tokyo).
"Surface-treated steel sheet and method of producing same" was invented by Takashi Ueno (Tokyo) and Yusuke Nakagawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a surface-treated steel sheet that can be produced without using hexavalent chromium and is excellent in adhesion to BPA-free paint and BPA-free painting corrosion resistance. A surface-treated steel sheet comprises: a steel sheet; a metallic Cr layer disposed on a surface of the steel sheet on at least one side; and a Cr oxide layer disposed on the metallic Cr layer, wherein a contact angle of ethylene glyco...