Patents by Inventor Richard T. Jaffre

Richard T. Jaffre 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).

  • Direct ironmaking or steelmaking apparatus using self-reducing iron oxide pellets
    Patent number: 5685524
    Abstract: Apparatus for preheating self-reducing pellets for direct use in ironmaking or steelmaking in which a preheat chamber contains the pellets and is primarily externally heated using waste exhaust gases and secondarily heated directly by using an internal preheat burner. The preheat chamber gases are vented into the external heating chamber where any CO present is post-combusted to produce CO.sub.2 with the energy from the post-combustion used to contribute to external heating of the preheat chamber.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: November 11, 1997
    Assignee: Chaparral Steel Company
    Inventors: Richard T. Jaffre, Harry D. Hunt