ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,581, issued on July 28, was assigned to WUHAN IRON AND STEEL CORP. (Wuhan City, China).

"Tire cord steel with high strength and low wire breakage rate, and rolling method and use thereof" was invented by Fan Zhang (Wuhan City, China), Anchao Ren (Wuhan City, China), Lei Guo (Wuhan City, China) and Tuming Ye (Wuhan City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Chemical compositions of a tire cord steel with high strength and low wire breakage rate may include Nb, V and N, and ([Nb]+[V])/[N] is 3-4.5, [Nb] representing the mass fraction of niobium element, [V] representing the mass fraction of vanadium element, and [N] representing the ma...