Patents by Inventor Robert E. Hagedorn

Robert E. Hagedorn 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).

  • Self-replenishing seal for the gas offtake piping of a coke oven and sealing method
    Patent number: 4286792
    Abstract: A self-replenishing seal for the gas offtake piping of a coke oven and sealing method. The collector main with which the piping communicates has a trough containing a body of liquid. The end of the piping extends into the liquid to provide a seal which permits relative movement. The trough is located under a nozzle which supplies flushing liquor to the main. Flushing liquor from the nozzle automatically replenishes liquid lost from the trough.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: September 1, 1981
    Assignee: United States Steel Corporation
    Inventors: Robert E. Hagedorn, Alphonse T. Lobue, Joseph G. Uhlman