US Patent Issued to TOYOTA JIDOSHA on June 17 for "Fuel cell separator manufacturing method" (Japanese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,409, issued on June 17, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Fuel cell separator manufacturing method" was invented by Yusuke Nomura (Toyota, Japan), Hijiri Hirata (Toyota, Japan) and Tsuyoshi Seguchi (Toyota, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a fuel cell separator manufacturing method involving immersing a stainless-steel base material formed into a shape of a separator in an acidic solution having a fluorine ion concentration of 0.1 ppm or higher and a pH of 1plus-minus0.2 at 80deg C.plus-minus5deg C. for 60 minutes or longer to perform a modification treatment on a surface of t...