US Patent Issued to NIPPON STEEL, NIPPON STEEL HARDFACING on May 27 for "Hearth roll for continuous annealing furnace" (Japanese Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,646, issued on May 27, was assigned to NIPPON STEEL Corp. (Tokyo) and NIPPON STEEL HARDFACING Corp. (Tokyo).

"Hearth roll for continuous annealing furnace" was invented by Yasushi Kurisu (Tokyo), Yu Li (Tokyo) and Koji Yagyu (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hearth roll for a continuous annealing furnace, the hearth roll comprising a thermal spray coating on a surface of the hearth roll, wherein the thermal spray coating comprises main components consisting of a Co-based alloy, a carbide of a transition metal, and a double oxide; and impurities, the double oxide consists of one or two types of a first double oxide consisting of...