ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,766, issued on May 6, was assigned to JFE STEEL Corp. (Tokyo).

"Stainless steel seamless pipe and method for manufacturing same" was invented by Yuichi Kamo (Tokyo) and Masao Yuga (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A stainless steel seamless pipe having high strength and excellent corrosion resistance, and a method for producing the same. The stainless steel seamless pipe has a specified composition and satisfies a predetermined formula. The stainless steel seamless pipe has a microstructure containing at least 30% martensitic phase, at most 60% ferrite phase, and at most 40% retained austenite phase by volume, the stainless steel...