US Patent Issued to JFE STEEL on June 24 for "Seamless steel pipe and method of manufacture thereof" (Japanese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,942, issued on June 24, was assigned to JFE STEEL Corp. (Tokyo).

"Seamless steel pipe and method of manufacture thereof" was invented by Shunsuke Sasaki (Tokyo), Ryosuke Tachi (Tokyo), Hiroyuki Yamasaki (Tokyo) and Hiroyuki Fukuda (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A seamless steel pipe has a t/Dout of 0.05 to 0.40, where t is a wall thickness (mm) of the seamless steel pipe, and Dout is an outside diameter (mm) of the seamless steel pipe. The seamless steel pipe has a maximum depth dmax (mm)less than equal to0.350 mm for defects in an inner surface of the steel pipe on a cross section perpendicular to a pipe axis. The seamless st...