Patents by Inventor Boyd S. Dawson

Boyd S. Dawson 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).

  • Vacuum refining of glass or the like with enhanced foaming
    Patent number: 4780122
    Abstract: Foaming of molten glass or the like as it enters a vacuum refining vessel is enhanced by altering the incoming stream so as to increase its surface area and/or retarding the passage of the stream through the vacuum headspace so as to increase its exposure to the vacuum.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: October 25, 1988
    Assignee: PPG Industries, Inc.
    Inventors: Ronald L. Schwenninger, Wright M. Welton, Boyd S. Dawson, Joseph M. Matesa, Larry J. Shelestak