Patents by Inventor Levi C. Allen

Levi C. Allen 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).

  • Fluid bed reactor
    Patent number: 9023425
    Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer wall, an insulation layer inwardly of the outer wall, at least one heater positioned inwardly of the insulation layer, a removable concentric liner inwardly of the heater, a central inlet nozzle, a plurality of fluidization nozzles, at least one cooling gas nozzle, and at least one product outlet. The system may include a removable concentric sleeve inwardly of the liner. In particular systems the central inlet nozzle is configured to produce a primary gas vertical plume centrally in the reactor chamber to minimize silicon deposition on reactor surfaces.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: May 5, 2015
    Assignee: REC Silicon Inc
    Inventors: E. Wayne Osborne, Michael V. Spangler, Levi C. Allen, Robert J. Geertsen, Paul E. Ege, Walter J. Stupin, Gerald Zeininger
  • Fluid bed reactor
    Patent number: 8075692
    Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer wall, an insulation layer inwardly of the outer wall, at least one heater positioned inwardly of the insulation layer, a removable concentric liner inwardly of the heater, a central inlet nozzle, a plurality of fluidization nozzles, at least one cooling gas nozzle, and at least one product outlet. The system may include a removable concentric sleeve inwardly of the liner. In particular systems the central inlet nozzle is configured to produce a primary gas vertical plume centrally in the reactor chamber to minimize silicon deposition on reactor surfaces.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: December 13, 2011
    Assignee: Rec Silicon Inc
    Inventors: E. Wayne Osborne, Michael V. Spangler, Levi C. Allen, Robert J. Geertsen, Paul E. Ege, Walter J. Stupin, Gerald Zeininger
  • FLUID BED REACTOR
    Publication number: 20110117729
    Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer wall, an insulation layer inwardly of the outer wall, at least one heater positioned inwardly of the insulation layer, a removable concentric liner inwardly of the heater, a central inlet nozzle, a plurality of fluidization nozzles, at least one cooling gas nozzle, and at least one product outlet. The system may include a removable concentric sleeve inwardly of the liner. In particular systems the central inlet nozzle is configured to produce a primary gas vertical plume centrally in the reactor chamber to minimize silicon deposition on reactor surfaces.
    Type: Application
    Filed: November 17, 2010
    Publication date: May 19, 2011
    Inventors: E. Wayne Osborne, Michael V. Spangler, Levi C. Allen, Robert J. Geertsen, Paul E. Ege, Walter J. Stupin, Gerald Zeininger
  • Silicon Spout-Fluidized Bed
    Publication number: 20080220166
    Abstract: Polysilicon is formed by pyrolytic decomposition of a silicon-bearing gas and deposition of silicon onto fluidized silicon particles. Multiple submerged spout fluidized bed reactors and reactors having secondary orifices are disclosed.
    Type: Application
    Filed: July 19, 2006
    Publication date: September 11, 2008
    Inventors: Paul Edward Ege, Jeffrey A. Hansen, Levi C. Allen