ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,690, issued on April 29, was assigned to Nippon Yakin Kogyo Co. Ltd. (Tokyo).
"Ni-Cr-Mo-Nb alloy" was invented by Taiki Maeda (Kawasaki, Japan) and Fugao Wei (Kawasaki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A Ni-Cr-Mo-Nb alloy consists of, in mass %, C: not more than 0.020%, Si: 0.02 to 1.0%, Mn: 0.02 to 1.0%, P: not more than 0.03%, S: not more than 0.005%, Cr: 18.0 to 24.0%, Mo: 8.0 to 10.0%, Al: 0.005 to 0.4%, Ti: 0.1 to 1.0%, Fe: not more than 5.0%, Nb: 2.5 to 5.0%, N: 0.002 to 0.02%, and at least one of W: 0.02 to 0.3% and V: 0.02 to 0.3%, and Ni as a remainder and inevitable impurities, in which an freely selected cross section o...