Patents by Inventor Millen E. Luhrs

Millen E. Luhrs 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).

  • Glass melting furnace and method of operation
    Patent number: 3998615
    Abstract: A regenerative tank-type furnace and a method for regulating the atmospheric pressure in its working end wherein the headspace above the molten glass contained in the tank at the melting end is separated from the headspace at the working end together with controllable means for regulating the atmospheric pressure in the headspace above the working end independently of the pressure in the headspace of the melting end. The furnace atmospheric pressure in the working end is sensed and compared with the ambient external atmospheric pressure outside the working end to produce a signal which is employed to make adjustments in the dampering of an exhaust system communicating the working end with the outside atmosphere.
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: December 21, 1976
    Assignee: Libbey-Owens-Ford Company
    Inventors: Clarence A. Gartz, Jr., Millen E. Luhrs