Patents by Inventor Leon Swennen

Leon Swennen 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).

  • Polyolefin foams and methods of making the same
    Patent number: 7173069
    Abstract: A non-crosslinked polyolefin foam comprises a plastics component and a blowing agent. The plastics component comprises a first constituent and a second constituent. The first constituent is a Ziegler-Natta catalyzed linear low density polyolefin and the second constituent is a low density polyolefin in one embodiment. The Ziegler-Natta catalyzed linear low density polyolefin has a polydispersity of less than 10 and a melt flow index less than 10 g/10 minutes. The second constituent may be a polypropylene.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: February 6, 2007
    Assignee: Pregis Innovative Packaging Inc.
    Inventor: Leon Swennen
  • Polyolefin foams and methods of making the same
    Publication number: 20040138320
    Abstract: A non-crosslinked polyolefin foam comprises a plastics component and a blowing agent. The plastics component comprises a first constituent and a second constituent. The first constituent is a Ziegler-Natta catalyzed linear low density polyolefin and the second constituent is a low density polyolefin in one embodiment. The Ziegler-Natta catalyzed linear low density polyolefin has a polydispersity of less than 10 and a melt flow index less than 10 g/10 minutes.
    Type: Application
    Filed: December 4, 2003
    Publication date: July 15, 2004
    Inventor: Leon Swennen
  • Plant and viral promoters
    Patent number: 6391639
    Abstract: The invention provides plant and viral promoters that can be used to confer high-level gene expression on transgenic plants. Representative promoters can be isolated from the genome of Australian banana-infecting badnaviruses from cultivars Mysore, Williams and Goldfinger. The invention further provides construct which include the disclosed promoters operatively linked to a coding sequence. Still further provided are a method of expressing the product of a gene in a plant cell, plant cells having DNA constructs within their genomes, and plants comprising the transgenic cells.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: May 21, 2002
    Assignee: Commonwealth Scientific and Industrial Research Organization
    Inventors: Peer Martin Philipp Schenk, László Sagi, Serge Remy, Rony Leon Swennen, Ralf Georg Dietzgen, Andrew David William Geering, Lee Anne McMichael, John Edwin Thomas, Christopher Peter Leslie Grof, Adrian Ross Elliott
  • Method of forming boards of foam polyolefin using needle punching to release blowing agent
    Patent number: 5776390
    Abstract: A board of foamed polyolefin is extruded and is foamed with a blowing agent that can be halogen-free hydrocarbon or CO.sub.2. To reduce the content of blowing agent, the board is needle-punched within three hours after extrusion to a perforation depth in the range of 60 to 97% of the board thickness. Such a board has good thermal stability.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 7, 1998
    Assignee: Scriptoria N.V.
    Inventors: Martin Fiddelaers, Leon Swennen