Patents by Inventor Joseph D. Stas

Joseph D. Stas 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).

  • Partial press in gravity bending furnace and method of use
    Patent number: 4804397
    Abstract: A partial press for shaping heat softened glass sheets as they are supported on a bending mold and conveyed through a lehr includes a press member that contacts selected portions of the glass sheet. The press member moves with the glass sheet so that there is no relative horizontal movement between the press member and the glass sheet as the glass sheet is conveyed through the lehr.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: February 14, 1989
    Assignee: PPG Industries, Inc.
    Inventors: Joseph D. Stas, Robert G. Frank, James H. Schwartz