Patents by Inventor David C. Spencer

David C. Spencer 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).

  • Publication number: 20130112134
    Abstract: Computer controlled quality control methods for manufacturing high purity polycrystalline granules are introduced. Polycrystalline silicon granules are sampled and converted into single crystal specimen in computer controlled system, eliminating the need of human operator in controlling the processing parameters. Single crystal silicon test samples, then characterized by FTIR and other standard analysis, are therefore more representative of the starting granular silicon.
    Type: Application
    Filed: August 31, 2012
    Publication date: May 9, 2013
    Applicant: GIGA INDUSTRIES, INC.
    Inventors: David C. Spencer, Jimmie D. Walter, Friedrich H. Doerbeck
  • Publication number: 20110290173
    Abstract: Computer controlled quality control methods for manufacturing high purity polycrystalline granules are introduced. Polycrystalline silicon granules are sampled and converted into single crystal specimen in computer controlled system, eliminating the need of human operator in controlling the processing parameters. Single crystal silicon test samples, then characterized by FTIR and other standard analysis, are therefore more representative of the starting granular silicon.
    Type: Application
    Filed: February 23, 2009
    Publication date: December 1, 2011
    Inventors: David C. Spencer, Jimmie D. Walter, Friedrich H. Doerbeck
  • Patent number: 6758509
    Abstract: A pick-up bed space divider includes a device for removably positioning in a pick-up bed. The pick-up bed has a bottom wall, a pair of side walls, and a tailgate. The bottom wall has a pair of wheel wells. The device has a first panel having an upper edge, a bottom edge and a pair of side edges. The bottom edge is selectively abutted against the bottom wall and positioned adjacent to the wheel wells. A second panel has a back edge, a front edge, and a pair of lateral edges. A hinge is attached to and pivotally couples the back edge to the upper edge. The second panel has a width between the lateral edges that is greater than a width between the side walls. The second panel abuts an upper edge of the side walls and the tailgate when the second panel is in a horizontal position.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: July 6, 2004
    Inventor: David C. Spencer