Granted Patent
Utility
US 5,285,850 · App. 07/775,287
Well completion system for oil and gas wells
Inventor:
Russell Irving Bayh, III
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Oct 11, 1991
Inventor
Russell Irving Bayh, III
Assignee (at issue)
Halliburton
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.