Patents by Inventor Jan Van der Sluis

Jan Van der Sluis 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).

  • Viscosimeter
    Patent number: 3930402
    Abstract: Viscosimeter comprising a flow system for the liquid to be tested, having a narrow zone, zones for determining the pressure of the liquid to be tested located before and after the narrow zone, said zones for determining the pressure of the liquid to be tested being surrounded by tubes of a thin-walled material adapted to transfer the pressure of the liquid within the tubes to pressure transduction liquids outside each of the tubes, each of said pressure transduction liquids being in contact with one of two pressure chambers of a pressure difference recording means in such a manner that the pressures of the liquid to be tested at both sides of the narrow zone are transferred to said pressure chambers.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: January 6, 1976
    Assignee: Gist-Brocades N.V.
    Inventors: Dirk Adrianus Detmar, Jan Van der Sluis, Izak Johannes Stolk, Marius Hendrik Johan Zuidweg