Patents by Inventor Bernd Marczinke

Bernd Marczinke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyethylene processes and compositions thereof
    Patent number: 9023945
    Abstract: Embodiments of the present disclosure relate to a method of preparing polyethylene compositions comprising polymerizing ethylene in a first gas-phase reactor and polymerizing ethylene in a second gas-phase reactor in the presence of hydrogen; wherein at least one of the first or second gas-phase reactors comprises a first and second polymerization zone; wherein a hydrogen pressure of the first and second polymerization zones are different such that at least a portion of the second ethylene cycles through the first and second polymerization zones and a gas mixture of each polymerization zone is partially or totally prevented from entering the other zone.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: May 5, 2015
    Assignee: Basell Polyolefine GmbH
    Inventors: Harilaos Mavridis, Gerhardus Meier, Ulf Schueller, Diana Doetsch, Bernd Marczinke, Iakovos Vittorias
  • POLYETHYLENE PROCESSES AND COMPOSITIONS THEREOF
    Publication number: 20140243475
    Abstract: Embodiments of the present disclosure relate to a method of preparing polyethylene compositions comprising polymerizing ethylene in a first gas-phase reactor and polymerizing ethylene in a second gas-phase reactor in the presence of hydrogen; wherein at least one of the first or second gas-phase reactors comprises a first and second polymerization zone; wherein a hydrogen pressure of the first and second polymerization zones are different such that at least a portion of the second ethylene cycles through the first and second polymerization zones and a gas mixture of each polymerization zone is partially or totally prevented from entering the other zone.
    Type: Application
    Filed: February 26, 2014
    Publication date: August 28, 2014
    Applicants: Basell Polyolefine GmbH, Equistar Chemicals, LP
    Inventors: Harilaos Mavridis, Gerhardus Meier, Ulf Schueller, Diana Doetsch, Bernd Marczinke, Iakovos Vittorias