Patents by Inventor Derek R. Oldnall

Derek R. Oldnall 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 reacting solid particulate reagents in an electric furnace
    Patent number: 5579334
    Abstract: A furnace comprises a furnace shell rotatable about a rotational axis. The furnace shell provides a furnace chamber for holding a solid particulate reagent as the furnace shell rotates. At least two electrodes are exposed to the chamber and are mounted in electrically insulated fashion therein. The electrodes are spaced apart so that solid particulate reagent in the furnace chamber can be heated up by direct resistance heating thereof, utilizing the electrodes.
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: November 26, 1996
    Inventors: Rodney C. Baxter, Derek R. Oldnall, Bodo R. Rohrmann