Patents by Inventor H. James Hall

H. James Hall 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).

  • System for the removal of contaminant soil-gas vapors
    Patent number: 5697437
    Abstract: A system extracts contaminated vapors from soil or other subsurface regions by using changes in barometric pressure to operate sensitive check valves that control air entry and removal from wells in the ground. The system creates an efficient subterranean flow of air through a contaminated soil plume and causes final extraction of the contaminants from the soil to ambient air above ground without any external energy sources.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: December 16, 1997
    Assignee: Lockheed Idaho Technologies Company
    Inventors: Jerry R. Weidner, Wayne C. Downs, Timothy G. Kaser, H. James Hall