ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,311, issued on June 24, was assigned to Borealis AG (Vienna).
"Ziegler-Natta catalysts for olefin polymerization" was invented by Victor Sumerin (Porvoo, Finland) and Georgy Kipiani (Porvoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to use of optionally monosubstituted 2,2-di(tetrahydrofuryl)methanes, as internal donors in Ziegler-Natta catalysts to obtain polymers with desirable properties. The present disclosure further concerns Ziegler-Natta catalyst components comprising said optionally monosubstituted 2,2-di(tetrahydrofuryl)methanes and Ziegler-Natta catalysts for olefin polymerization comprising said ...