Patents by Inventor Wilfred Griekspoor

Wilfred Griekspoor 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).

  • Deep ocean conduit
    Patent number: 4358225
    Abstract: A flexible conduit for carrying cold ocean water at great depths to the surface comprises a plurality of spaced, heavy annular rings 1 of concrete or the like between which are mounted tubes 2 of flexible material which form the walls of the conduit. The tubes may bear the tension load of the rings directly, or they may be suspended from loosely mounted rods 6 or cables 11.
    Type: Grant
    Filed: July 22, 1980
    Date of Patent: November 9, 1982
    Assignee: Hollandsche Beton Groep N.V.
    Inventors: Barend J. G. van der Pot, Wilfred Griekspoor