Patents by Inventor John Schupp

John Schupp 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).

  • Supplemental heating unit for crystal growth furnace
    Patent number: 6652649
    Abstract: A crystal growth station including a cylindrical crucible having powered bottom and top resistance heaters mounted below and above the crucible, respectively. A supplemental heating unit is positioned around the bottom edge of the crucible. The supplemental heating unit may be unpowered or powered to heat it independently of the top and bottom heaters. If unpowered, then the supplemental heating unit is formed of a cylinder around the lower portion of the crucible side wall and a washer shaped disk member extending under part,of the crucible bottom wall. The supplemental heating unit is generally wedge shaped. The supplemental heating unit is heated by radiation from the bottom heater. The heat is conducted from the disk to the cylinder. A supplemental heater may be similarly used at the top edge of the crucible. If powered, the cylinder and the disk have slits therein to form current paths.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: November 25, 2003
    Assignee: ACT Optics & Engineering, Inc.
    Inventors: David T. Hearst, John Schupp