Patents by Inventor Frederick Carl

Frederick Carl 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).

  • Subsurface connection methods for subsurface heaters
    Publication number: 20070045267
    Abstract: A system for heating a subsurface formation is described. The system includes a first elongated heater in a first opening in the formation. The first elongated heater includes an exposed metal section in a portion of the first opening. The portion is below a layer of the formation to be heated. The exposed metal section is exposed to the formation. A second elongated heater is in a second opening in the formation. The second opening connects to the first opening at or near the portion of the first opening below the layer to be heated. At least a portion of an exposed metal section of the second elongated heater is electrically coupled to at least a portion of the exposed metal section of the first elongated heater in the portion of the first opening below the layer to be heated.
    Type: Application
    Filed: April 21, 2006
    Publication date: March 1, 2007
    Inventors: Harold Vinegar, Ronald Bass, Dong Kim, Stanley Mason, George Stegemeier, Thomas Keltner, Frederick Carl