Granted Patent
Utility
US 5,009,266 · App. 07/394,391
Method for in situ contaminant extraction from soil
Inventor:
Douglas K. Dieter
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Aug 15, 1989
Inventor
Douglas K. Dieter
Assignees (at issue)
Solvent Services, Inc.,
Amit Nagpal
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.