ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,892, issued on Jan. 20, was assigned to ExxonMobil Chemical Patents Inc. (Baytown, Texas).

"Alkylation of transition metal coordination catalyst complexes" was invented by Lubin Luo (Houston), Nikola S. Lambic (Houston) and Jo Ann M. Canich (Houston).

According to the abstract* released by the U.S. Patent & Trademark Office: "The alkylation of transition metal coordination catalyst complexes (such as metallocenes and/or post-metallocenes) in non-polar solvents with high conversion to the dialkylated transition metal coordination catalyst complex may be accomplished by reacting (a) a transition metal coordination catalyst complex comprising a transition metal linked to at least on...