Patents by Inventor William J. Muhlstadt

William J. Muhlstadt 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).

  • Control of thermal convection in a float glass forming chamber
    Patent number: 3934994
    Abstract: Thermal convection currents in the headspace above a body of glass being formed into a continuous sheet of glass while supported on molten metal are controlled to prevent the development of surface distortion patterns in the upper surface of the glass being formed. This is accomplished by establishing a series of small convection cells at least adjacent the upper surface of the glass so that the characteristic convective cooling rate for the glass in the forming chamber is substantially diminished, particularly near the inlet end of the forming chamber.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: January 27, 1976
    Assignee: PPG Industries, Inc.
    Inventors: William J. Muhlstadt, James R. Schornhorst