US Patent Issued to TOYO KOHAN on Oct. 21 for "Surface-treated steel sheet and production method therefor" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,697, issued on Oct. 21, was assigned to TOYO KOHAN Co. LTD. (Tokyo).

"Surface-treated steel sheet and production method therefor" was invented by Yuji Nakano (Kudamatsu, Japan), Koh Yoshioka (Kudamatsu, Japan) and Kazuhiko Ishihara (Kudamatsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surface-treated steel sheet including: a steel sheet; and a nickel-cobalt-iron diffusion layer formed on the steel sheet as an outermost layer. When the intensities for Ni, Co and Fe are consecutively measured from a surface of the nickel-cobalt-iron diffusion layer in the depth direction by radio frequency glow discharge optical emission spectrometry, and...