ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,257, issued on June 24, was assigned to ExxonMobil Chemical Patents Inc. (Baytown, Texas).
"Metallocenes and methods thereof" was invented by Matthew W. Holtcamp (Huffman, Texas), Charles J. Harlan (Houston), Subramaniam Kuppuswamy (Mont Belvieu, Texas), Matthew S. Bedoya (Humble, Texas) and Laughlin G. McCullough (League City, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides metallocene catalyst compounds including at least one -Si- containing linker, catalyst systems including such compounds, and uses thereof. Catalyst compounds of the present disclosure can be hafnium-containing compounds having one or more cyc...