Patents by Inventor John W. Chisholm

John W. Chisholm 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).

  • Highwall mining system
    Patent number: 6652035
    Abstract: A highwall mining system of the type wherein multiple conveyor cars are connected together to form a conveyor train which extends into a seam being mined by a mechanical miner located at the inner end of the conveyor train is capable of effective operation in steep dip seams, e.g. up to about 30°, and is constructed so that it can be quickly disassembled, moved, and reassembled and put into operation with minimal downtime.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: November 25, 2003
    Assignee: Nova Construction Company Limited
    Inventor: John W. Chisholm
  • Highwall mining system
    Publication number: 20030042784
    Abstract: A highwall mining system of the type wherein multiple conveyor cars are connected together to form a conveyor train which extends into a seam being mined by a mechanical miner located at the inner end of the conveyor train is capable of effective operation in steep dip seams, e.g. up to about 30°, and is constructed so that it can be quickly disassembled, moved, and reassembled and put into operation with minimal downtime.
    Type: Application
    Filed: December 5, 2001
    Publication date: March 6, 2003
    Inventor: John W. Chisholm
  • Gamma ray spectral tool for well logging
    Patent number: 5608214
    Abstract: A gamma ray spectral tool is provided that can be used in slick line systems. The tool includes a battery, a controller, and a memory. In operation, the tool compresses data from the spectral detector for storage in the memory, allowing for long runs without the memory overflowing. Further, a controller latches the self-adjusting stabilization feature of the spectral detector when gamma ray intensity exceeds a predetermined threshold, preventing erroneous "stabilization" by the stabilization feature of the spectral detector.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: March 4, 1997
    Assignee: Protechnics International, Inc.
    Inventors: Emilio A. Baron, David J. Berneking, John W. Chisholm, Marc K. Fisher, William F. Trainor, James R. Foreman
  • Surface located isotope tracer injection apparatus
    Patent number: 5049743
    Abstract: The present disclosure is directed to a method and apparatus for controllably injection a radioactive isotope tracer fluid into a fracture fluid, a manifold or mud flow line connected to a well. It is best used in measuring well stimulation procedures based on injection of tracer isotopes so that stimulation performance data can be obtained by gamma ray spectroscopic measuring instruments lowered in the well borehole after fracture. The present apparatus utilizes a tank supply of tracer fluid connected through a pump into the mud line wherein the pump drives a tachometer, and utilizes a CPU to respond to pumping rate measurements and adjust the pumped rate of the tracer fluid.
    Type: Grant
    Filed: January 17, 1990
    Date of Patent: September 17, 1991
    Assignee: ProTechnics International, Inc.
    Inventors: Lawrence Taylor, III, John W. Chisholm, Philip T. Thayer