Patents by Inventor Duane E. Wiedor

Duane E. Wiedor 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).

  • Electric furnace construction
    Patent number: 4620309
    Abstract: A furnace with the end portions of a heater supporting anchor rod embedded in the rigid sidewall insulation of the furnace. The anchor rods do not deflect under the weight of the heaters and the entire weight of the anchor rods and heaters is supported by the sidewall insulation.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 28, 1986
    Assignee: PPG Industries, Inc.
    Inventors: Stephen J. Schultz, John F. Huebner, Duane E. Wiedor, Dennis S. Pribish