US Patent Issued to Borealis on July 1 for "Process for producing a prepolymerized solid Ziegler-Natta catalyst" (Austrian, Finnish Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,683, issued on July 1, was assigned to Borealis AG (Vienna).

"Process for producing a prepolymerized solid Ziegler-Natta catalyst" was invented by Torvald Vestberg (Porvoo, Finland), Markku Vahteri (Porvoo, Finland), Anna Fait (Linz, Austria), Pauli Leskinen (Porvoo, Finland) and Jingbo Wang (Linz, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for producing a prepolymerized solid Ziegler-Natta catalyst in batch mode, a prepolymerized solid Ziegler-Natta catalyst, a process for producing a propylene polymer using said prepolymerized solid Ziegler-Natta catalyst, a prepolymerized solid Ziegler-Natta c...