Patents by Inventor Frank W. Purdy

Frank W. Purdy 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).

  • Offshore platform for arctic environments
    Patent number: 3952527
    Abstract: Offshore platform for resisting the pressure of external ice formations in which the base is generally frustoconical having upwardly and inwardly sloping surfaces. The upper part of the structure is an inverted cone frustum with upwardly and outwardly sloping surfaces to deflect the ice as it rides up and base. The waist surface is rounded. The interior of the platform is formed of vertical tubes which are filled with frozen hard material to assist the structure in resisting external forces.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: April 27, 1976
    Inventors: Edward R. Vinieratos, Robert E. Levien, Frank W. Purdy