Patents by Inventor Klas Elfving

Klas Elfving 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).

  • Process for producing objects
    Patent number: 6582633
    Abstract: The invention concerns a process for preparation of light weight objects comprising calendering, extrusion, blow or injection moulding a resin of polypropylene, polystyrene, HD polyethylene or copolymers thereof and, admixed therein, thermally expandable microspheres including a thermoplastic polymer shell encapsulating a propellant, at a temperature sufficient to result in expansion of the microspheres, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 80 wt % of nitrile containing monomers. The invention further concerns light weight objects obtainable by the process.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: June 24, 2003
    Assignee: Akzo Nobel N.V.
    Inventors: Klas Elfving, Anna Kron, Peter Sjögren, Odd Bjerke
  • Process for producing objects
    Publication number: 20020132100
    Abstract: The invention concerns a process for preparation of light weight objects comprising calendering, extrusion, blow or injection moulding a resin of polypropylene, polystyrene, HD polyethylene or copolymers thereof and, admixed therein, thermally expandable microspheres including a thermoplastic polymer shell encapsulating a propellant, at a temperature sufficient to result in expansion of the microspheres, wherein said polymer shell is made of a homo- or co-polymer from ethylenically unsaturated monomers comprising more than 80 wt % of nitrile containing monomers. The invention further concerns light weight objects obtainable by the process.
    Type: Application
    Filed: January 17, 2001
    Publication date: September 19, 2002
    Applicant: AKZO NOBEL N.V
    Inventors: Klas Elfving, Anna Kron, Peter Sjogren, Odd Bjerke