Granted Patent
Utility
US 5,889,217 · App. 08/650,473
Process and apparatus for obtaining samples of liquid and gas from soil
Inventors:
Joseph Rossabi, Christopher P. May, Bradley E. Pemberton, Jim Shinn, Keith R. Sprague
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: May 20, 1996
Inventors
Joseph Rossabi
Christopher P. May
Bradley E. Pemberton
Jim Shinn
Keith R. Sprague
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.