ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,293, issued on Nov. 3, was assigned to JFE STEEL Corp. (Tokyo).

"Supply heat amount estimating method, supply heat amount estimating device, and blast furnace operating method" was invented by Kazuhira Ichikawa (Tokyo), Tetsuya Yamamoto (Tokyo), Takeshi Sato (Tokyo) and Yuki Kawashiri (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A supply heat amount estimating method for estimating an amount of heat supplied to pig iron in a blast furnace from an amount of heat supplied into the blast furnace and a rate of production of molten pig iron in the blast furnace, the supply heat amount estimating method includes: estimating a change in carried-out...