Patents by Inventor PETTER HOLEN

PETTER HOLEN 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).

  • HEATING SYSTEM FOR CRUDE OIL TRANSPORTING METALLIC TUBES
    Publication number: 20020028070
    Abstract: Heating system for crude oil or other viscous fluids transporting metallic tubes having a thermal insulation, wherein a defined length of the said metallic tube acts as a heating element, which is electrically insulated by the tube insulation itself and whereby the metallic tube has connections with respective feeder and return cables at the beginning and at the end of the length of the tube defining the length of the heating element.
    Type: Application
    Filed: September 10, 1999
    Publication date: March 7, 2002
    Inventor: PETTER HOLEN