Patents by Inventor Kai Killerud

Kai Killerud 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).

  • Device for joining of pipelines
    Patent number: 4971307
    Abstract: A device for joining of pipelines for transportation of fluids allowing pigs to pass the coupling undisturbed. The diameter of the conduit in the middle portion (II) of the coupling is larger than the nominal internal diameter of the pipelines.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: November 20, 1990
    Assignee: Den Norske Stats Oljeselskap a.s.
    Inventors: Kai Killerud, Arne Vingerhagen, Audun Bratseth