US Patent 6,207,608
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
The process of preparing polyolefins using rac ansa-metallocene metal amide complexes directly by use of aluminum alkyl in combination with a cocatalyst.
Jordan, Richard F. and Kim, Il Olefin polymerization with direct use of ansa-metallocene amide complexes as catalysts. US Patent 6,207,608 filed August 09, 1996 and issued March 27, 2001. https://ir.uiowa.edu/patents/266