Patents Represented by Attorney Ralph H. Dogherty

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  • Shaft furnace for production of iron carbide
    Patent number: 5618032
    Abstract: Apparatus for the production of iron carbide in a shaft furnace, by reacting a carbon containing reducing gas as the process gas with particulate metal oxide material for an extended residence time at low temperature, including residence time and operating temperature controls. The resulting iron carbide product is also disclosed.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: April 8, 1997
    Assignee: Midrex International B.V. Rotterdam, Zurich Branch
    Inventors: David C. Meissner, Winston L. Tennies