Patents by Inventor John J. F. Deans

John J. F. Deans 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).

  • Pressurized waterstops
    Patent number: 4622784
    Abstract: A waterstop for concrete structures, of the type consisting of an extruded strip of elastomeric material having a general flat medial portion extending between longitudinally ribbed side wing anchor portions is internally pressurized so as to compensate for dimensional changes of the concrete joint.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: November 18, 1986
    Inventors: David A. Black, John J. F. Deans