Granted Patent
Utility
US 6,457,533 · App. 09/462,654
Downhole tubing
Inventor:
Paul David Metcalfe
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Dec 19, 2000
Inventor
Paul David Metcalfe
Assignee (at issue)
Weatherford/Lamb, 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.