ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,409, issued on Sept. 8, was assigned to ArcelorMittal (Luxembourg).

"TWIP steel sheet having an austenitic matrix" was invented by Colin Scott (Brantford, Canada) and Blandine Remy (Sanry les Vigy, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A TWIP steel sheet is provided having an austenitic matrix including by weight: 0.1less than equal toCless than equal to1.2%, 13.0less than equal toMngreater than25.0%, 0.1less than equal toSiless than equal to3.0%, 0.1less than equal toCuless than equal to5.0%, Sless than equal to0.030%, Pless than equal to0.080%, Nless than equal to0.1%, 0.1less than equal toAlless than equal to4.0% and 0.1less than ...