Resources Contact Us Home
Method and apparatus for detection of volatile soil contaminants in situ

Image Number 4 for United States Patent #4834194.

The invention relates to methods and apparatus for agitating and heating a sub-surface volume of soil to liberate volatile compositions therefrom which are transmitted through a special flow passage created through the soil to the soil surface where they are analysed to determine the presence or absence of selected contaminants. A low pressure sink is provided to ensure proper flow of volatiles rapidly to the surface and to prevent contamination of adjacent soil blocks or cylinders during treatment.

  Recently Added Patents
Client-managed group communication sessions within a wireless communications system
Nonvolatile semiconductor memory device and method for controlling the same
Methods and system for displaying segmented images
Light fixture
Sweetener compositions having enhanced sweetness and improved temporal and/or flavor profiles
Systems and/or methods for using air/wind power to charge/re-charge vehicle batteries
Authenticated secret sharing
  Randomly Featured Patents
Holding pin
Light emitting display
Methods and apparatus for performing interstitial laser therapy and interstitial brachytherapy
Ligation with hammerhead ribozymes
Digital signature purpose encoding
Recovery of pyridine or methylpyridines or mixtures thereof from methyl butanedicarboxylate containing reaction mixtures
Phase change memory device and fabricating method
Chair with adjustable arm assemblies
Method and apparatus for rapid temperature changes
Casket with ornamentation