Granted Patent
Utility
US 5,550,331 · App. 08/456,751
System and method of protecting instruments from down-hole fluids
Inventor:
Jack T. Thompson
Patented Case
View Patent ↗
Granted: Aug 27, 1996
Filed: Jun 1, 1995
Inventor
Jack T. Thompson
Assignee (at issue)
Westech Geophysical, 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.