Patents by Inventor Willem Drinkwaard, deceased

Willem Drinkwaard, deceased 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).

  • Marine riser measuring joint
    Patent number: 4174628
    Abstract: A marine pipe riser, through which wells may be drilled during offshore drilling operations, is provided with an instrumented section equipped with stress-measuring elements so that loads and stress on the pipe riser may be measured.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: November 20, 1979
    Assignee: Shell Oil Company
    Inventors: Hendrik K. J. van den Bussche, Nicolaas J. van Soldt, Adrianus H. van de Krogt, Willem Drinkwaard, deceased