ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,310, issued on June 24, was assigned to Basell Polyolefine GmbH (Wesseling, Germany).
"Apparatus and process for the gas-phase polymerization" was invented by Giulia Mei (Ferrara, Italy), Giuseppe Penzo (Mantova, Italy), Riccardo Rinaldi (Ferrara, Italy), Emanuele Azzarello (Ferrara, Italy) and Rosario Pesare (Ferrara, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for carrying out a gas-phase olefin polymerization having a first polymerization zone having a cylindrical segment of diameter D01, a second polymerization zone having a cylindrical upper part of diameter D05 and a cylindrical lower part of diameter D06, a separation zo...