US Patent Issued to Dow Global Technologies on June 2 for "Bis-phenoxy-ether ligands for group IV polyolefin catalysis" (Michigan Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,962, issued on June 2, was assigned to Dow Global Technologies LLC (Midland, Mich.).

"Bis-phenoxy-ether ligands for group IV polyolefin catalysis" was invented by Robert David Grigg (Midland, Mich.), Brad C. Bailey (Midland, Mich.), James A. Walker (Midland, Mich.) and Sukrit Mukhopadhyay (Midland, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Catalyst systems comprising one or more metal-ligand complexes according to formula (I). M is a metal chosen from titanium, zirconium, or hafnium, the metal having a formal oxidation state of +2, +3, or +4; each X is a monodentate or bidentate ligand independently chosen from unsaturated (C2-C50)hydrocar...