Granted Patent
Utility
US 5,398,757 · App. 08/199,527
Mono-well for soil sparging and soil vapor extraction
Inventors:
Lawrence J. Corte, Adrian Brown
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Feb 22, 1994
Inventors
Lawrence J. Corte
Adrian Brown
Assignee (at issue)
K N Energy, Inc.
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.