Patents by Inventor Hans Narvestad

Hans Narvestad 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).

  • Degassing apparatus
    Patent number: 7267803
    Abstract: A degassing apparatus for use with a polymerisation reactor is disclosed. Slurry from the reactor is discharged into a flask tank (3) in which monomers or dilluent vaporise to form a gas. Filler units (9, 10) are provided at the upper part of the flash tank (3). They may be selectively connected to the flash tank by valves (11, 12). No cyclone etc. is provided between the flash tank and the filter (9, 10) and these particles may then fall back into the flash tank (3). The filters may be separately isolated for cleaning or replacement.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: September 11, 2007
    Assignee: Borealis Technology Oy
    Inventors: Karin H Knudsen, Willy Wilhelmsen, Hans Narvestad, Odd J. Vardal, Ingrid S. Melaaen
  • Degassing apparatus
    Publication number: 20030156999
    Abstract: A degassing apparatus for use with a polymerisation reactor is disclosed. Slurry from the reactor is discharged into a flask tank (3) in which monomers or dilluent vaporise to form a gas. Filler units (9, 10) are provided at the upper part of the flash tank (3). They may be selectively connected to the flash tank by valves (11, 12). No cyclone etc. is provided between the flash tank and the filter (9, 10) and these particles may then fall back into the flash tank (3). The filters may be separately isolated for cleaning or replacement.
    Type: Application
    Filed: December 19, 2002
    Publication date: August 21, 2003
    Inventors: Karin H Knudsen, Willy Wilhelmsen, Hans Narvestad, Odd J Vardal, Ingrid S Melaaen