ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,768,598, issued on Oct. 20, was assigned to PAUL WURTH S.A. (Luxembourg).

"Exchangeable cooled nose with ceramic injector passage" was invented by Nicolas Maggioli (Thionville, France), Klaus Peter Kinzel (Sandweiler, Luxembourg) and Gilles Kass (Sanem, Luxembourg).

According to the abstract* released by the U.S. Patent & Trademark Office: "A gas injection system for a blast furnace or shaft furnace or metallurgical furnace comprising a furnace wall and a cooling plate wherein the gas injection system comprises a gas distribution pipe, one or more injectors having a nozzle, where the nozzle comprises a ceramic insert, where the cooling element has a hot side, turned away from the fur...