Patents by Inventor Elmer J. Kulousek

Elmer J. Kulousek 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).

  • Safety closure device for a pressure vessel
    Patent number: 4135640
    Abstract: The hold-down bolts on the cover of a pressure vessel cannot be loosened until a pressure relief valve has been opened to relieve the pressure in the vessel and to release a safety member positioned over the bolts.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: January 23, 1979
    Assignee: Industrial Filter & Pump Mfg. Co.
    Inventors: Arthur E. MacQuilkin, Elmer J. Kulousek, Earl A. Borre