Patents by Inventor Jon Aarstein

Jon Aarstein 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).

  • Umbilical for subsea installation
    Patent number: 8314330
    Abstract: An umbilical for subsea installation has a core of at least two longitudinal elements like cables, tubes and solid and/or hollow filling elements and a cover surrounding the core. At least one of the hollow filling elements is provided with several perforations and the cover is permeable for sea water, thereby allowing seawater to fill the interior of the filler elements as well as the interstices between the cable, tube and the filler elements and the cover when the umbilical is submerged.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: November 20, 2012
    Assignee: Nexans
    Inventors: Ragnvald Graff, Einar Mjelstad, Ketil Opstad, Bjorn H. Ramstad, Morten Stensland, Jon Aarstein
  • Umbilical for subsea installation
    Publication number: 20120125652
    Abstract: An umbilical for subsea installation has a core of at least two longitudinal elements like cables, tubes and solid and/or hollow filling elements and a cover surrounding the core. At least one of the hollow filling elements is provided with several perforations and the cover is permeable for sea water, thereby allowing seawater to fill the interior of the filler elements as well as the interstices between the cable, tube and the filler elements and the cover when the umbilical is submerged.
    Type: Application
    Filed: September 26, 2005
    Publication date: May 24, 2012
    Inventors: Ragnvald Graff, Einar Mjelstad, Ketil Opstad, Bjorn H. Ramstad, Morten Stensland, Jon Aarstein