Granted Patent
Utility
US 6,772,836 · App. 10/315,665
Expandable tubing and method
Inventors:
L. McD. Schetky, Craig D. Johnson, Matthew R. Hackworth, Patrick W. Bixenman
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Dec 10, 2002
Inventors
L. McD. Schetky
Craig D. Johnson
Matthew R. Hackworth
Patrick W. Bixenman
Assignee (at issue)
Schlumberger Technology Corporation
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.