ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,816, issued on April 14, was assigned to Dow Global Technologies LLC (Midland, Mich.).

"Alkylene oxide polymerization using aluminum compounds and phosphorus-nitrogen bases" was invented by Anne-Catherine Bedard (Midland, Mich.), Matthew E. Belowich (Midland, Mich.), Mari S. Rosen (Houston), Sandra Varinia Bernales Candia (Midland, Mich.), David A. Babb (Lake Jackson, Texas), Clark H. Cummins (Midland, Mich.), Richard J. Keaton (Pearland, Texas), Matthew M. Yonkey (Sanford, Mich.) and Peter J. Waller (Midland, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Polyethers are prepared by polymerizing an alkylene oxide in the presence of a starter,...