Patents by Inventor Minor R. Wiseman

Minor R. Wiseman 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).

  • Solenoid operated tubing safety valve
    Patent number: 4161215
    Abstract: A wireline retrievable, subsurface tubing safety valve that is opened and held open by the transmission of electric current from the surface. Interruption of the current supply results in automatic closure of the valve. The device includes a pressure equalizing valve which enables the valve to be opened against a high differential pressure.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: July 17, 1979
    Assignee: Continental Oil Company
    Inventors: Henry A. Bourne, Jr., Louis M. Ayers, Minor R. Wiseman