US Patent Issued to PROTERIAL on Jan. 13 for "Spheroidal graphite cast iron, cast article and automobile structure part made thereof, and method for producing spheroidal graphite cast iron article" (Japanese Inventor)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,901, issued on Jan. 13, was assigned to PROTERIAL LTD. (Tokyo).

"Spheroidal graphite cast iron, cast article and automobile structure part made thereof, and method for producing spheroidal graphite cast iron article" was invented by Lin Wang (Moka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A spheroidal graphite cast iron meeting N(5-)less than=250, N(5-20)/N(5-)less than=0.6, and N(30-)/N(5-)less than equal to0.2, wherein N(5-) represents the number (/mm2) of graphite particles having equivalent-circle diameters of 5 micro metre or more, N(5-20) represents the number (/mm2) of graphite particles having equivalent-circle diameters of 5 mic...