Patents by Inventor Arden W. Swanson

Arden W. Swanson 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).

  • Iron carbide process
    Patent number: 6165249
    Abstract: A process for producing iron carbide in a fluid bed reactor in which the pressure may be maintained in excess of the pressure at which the mole fraction of hydrogen in the process gas begins to decrease. The hydrogen concentration is increased above the equilibrium concentration for hydrogen at the temperature and pressure in the reactor. Further improvements are gained by preheating a iron ore reactor feed in which the iron oxide is primarily in the form of hematite under a reducing atmosphere, and using at least two fluid bed reactors in series.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: December 26, 2000
    Assignee: Iron Carbide Holdings, Ltd.
    Inventor: Arden W. Swanson
  • Iron carbide process
    Patent number: 5804156
    Abstract: A process for producing iron carbide in a fluid bed reactor in which the pressure is maintained in excess of the pressure at which the mole fraction of hydrogen in the process gas begins to decrease. The hydrogen concentration may also be increased above the equilibrium concentration for hydrogen at the temperature and pressure in the reactor. Further improvements are gained by preheating a iron ore reactor feed in which the iron oxide is primarily in the form of hematite under a reducing atmosphere, and using at least two fluid bed reactors in series.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 8, 1998
    Assignee: Iron Carbide Holdings, Ltd.
    Inventors: Gordon H. Geiger, Arden W. Swanson, Frank A. Stephens, Frank M. Stephens, Jr.
  • Iron carbide process
    Patent number: 5690717
    Abstract: A process for producing iron carbide in a fluid bed reactor in which the pressure may be maintained in excess of the pressure at which the mole fraction of hydrogen in the process gas begins to decrease. The hydrogen concentration is increased above the equilibrium concentration for hydrogen at the temperature and pressure in the reactor. Further improvements are gained by preheating a iron ore reactor feed in which the iron oxide is primarily in the form of hematite under a reducing atmosphere, and using at least two fluid bed reactors in series.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: November 25, 1997
    Assignee: Iron Carbide Holdings, Ltd.
    Inventors: James E. Stevens, Arden W. Swanson