Granted Patent
Utility
US 5,503,225 · App. 08/426,306
System and method for monitoring the location of fractures in earth formations
Inventor:
Robert J. Withers
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Apr 21, 1995
Inventor
Robert J. Withers
Assignee (at issue)
Atlantic Richfield Company
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.