Patents by Inventor John S. Boruszewski

John S. Boruszewski 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).

  • Foam welding apparatus
    Patent number: 4175998
    Abstract: Improved welds for thermoplastic foam insulation spirally deposited about a structure are obtained employing a thin, resistance heated welding blade which beneficially is positioned by means of a four-bar linkage connecting the blade to the blade support.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: November 27, 1979
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Hay, II, John S. Boruszewski