Patents by Inventor John H. Engstrom

John H. Engstrom 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).

  • Method and apparatus for cooling glass furnace forehearth
    Patent number: 4415349
    Abstract: An apparatus and method is disclosed for cooling a molten stream of glass flowing in a firebrick hearth from an entrance end to an exit end of a glass furnace forehearth, the method comprising the steps of: cooling the bottom of the hearth which cools the molten glass by forcing air through ducts in the hearth bottom insulation; cooling each side of the hearth which cools the molten glass by forcing air through ducts along the side of the hearth.
    Type: Grant
    Filed: April 15, 1982
    Date of Patent: November 15, 1983
    Assignee: Owens-Illinois, Inc.
    Inventors: John H. Engstrom, Robert W. Ellis