Patents by Inventor Dirk Poesen

Dirk Poesen 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).

  • Broadening the molecular weight distribution of polyolefins materials made in a horizontal stirred gas phase reactor
    Patent number: 8658745
    Abstract: An olefin polymerization process comprises gas-phase polymerization of at least one olefin monomer in more than one polymerization zones in one or more polymerization reactors using a high activity catalyst injected in the front end of the reactor to give solid polymer particles. According to the process of the invention, different hydrogen to olefin ratios are applied to the reactor leading to the production of very different molecular weights and therefore broadening the molecular weight distribution of the polymer produced.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: February 25, 2014
    Assignee: INEOS USA LLC
    Inventors: Ton Kroezen, William D. Stephens, Mattijs van der Ham, Dennis L. McGinn, Pierre Sere-Peyrigain, Dirk Poesen
  • Horizontal agitator
    Patent number: 8383740
    Abstract: The invention is an improved apparatus for continuously stirring polymer particles in reactive gas-filled polymerization reactors incorporating contiguous paddle stations on a coaxial drive shaft wherein the drive shaft is driven by a hydraulic motor.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: February 26, 2013
    Assignee: Ineos USA LLC
    Inventor: Dirk Poesen
  • Horizontal agitator
    Publication number: 20130041118
    Abstract: The invention is an improved apparatus for continuously stirring polymer particles in reactive gas-filled polymerization reactors incorporating contiguous paddle stations on a coaxial drive shaft wherein the drive shaft is driven by a hydraulic motor.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Inventor: Dirk Poesen
  • BROADENING THE MOLECULAR WEIGHT DISTRIBUTION OF POLYOLEFINS MATERIALS MADE IN HORIZOR
    Publication number: 20120095171
    Abstract: An olefin polymerization process comprises gas-phase polymerization of at least one olefin monomer in more than one polymerization zones in one or more polymerization reactors using a high activity catalyst injected in the front end of the reactor to give solid polymer particles. According to the process of the invention, different hydrogen to olefin ratios are applied to the reactor leading to the production of very different molecular weights and therefore broadening the molecular weight distribution of the polymer produced.
    Type: Application
    Filed: February 20, 2009
    Publication date: April 19, 2012
    Inventors: Ton Kroezen, William D. Stephens, Mattijs van der Ham, Dennis L. McGinn, Pierre Sere-Peyrigain, Dirk Poesen