Patents by Inventor G. Robert Carleton

G. Robert Carleton 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).

  • Gas hearth bed with grooved exit portion
    Patent number: 4249928
    Abstract: Tempered flat glass sheets produced by the gas hearth process tend to become warped and/or kinked. Grooving the surface of the gas hearth bed at its exit portion only in the vicinity of supply passages not interspersed with exhaust passages reduces the warping and kinking to a significant degree.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: February 10, 1981
    Assignee: PPG Industries, Inc.
    Inventor: G. Robert Carleton