Patents by Inventor H. E. Dunham

H. E. Dunham 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).

  • Concentrate burner
    Patent number: 4422624
    Abstract: A burner for smelting metal-bearing sulfide ores or concentrates by means of an oxygen-rich gas is disclosed. The oxygen-rich gas is introduced into a chamber so as to aspirate or eject the metal-bearing sulfide ore or concentrate. The oxygen-rich gas and sulfide concentrate are intimately admixed in a cylindrical mixing chamber and then jetted into the heated atmosphere of a smelting furnace.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: December 27, 1983
    Assignee: Phelps Dodge Corporation
    Inventors: H. E. Dunham, David Arana, Terrell D. Jackson, Brent E. McEuen, John A. Schneider