Granted Patent
Utility
US 5,495,174 · App. 08/113,969
Method and apparatus for detecting boundary stratum and adjusting the direction of drilling to maintain the drill string within a bed of interest
Inventors:
M. Vikram Rao, Paul F. Rodney
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Aug 30, 1993
Inventors
M. Vikram Rao
Paul F. Rodney
Assignee (at issue)
Baroid Technology, 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.