ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,320, issued on Nov. 18, was assigned to Borealis AG (Vienna).
"Catalyst system" was invented by Luigi Maria Cristoforo Resconi (Linz, Austria), Wilfried Toeltsch (Linz, Austria), Ville Virkkunen (Porvoo, Finland), Kalle Kallio (Porvoo, Finland), Soile Lustig (Porvoo, Finland), Noureddine Ajellal (Porvoo, Finland), Marja Mustonen (Porvoo, Finland) and Alexander Reznichenko (Porvoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A specific class of metallocene complexes in combination with a boron containing cocatalyst and an aluminoxane cocatalyst, its use for producing propylene homopolymers, propylene copolymers, especially with ethylene, a...