Granted Patent
Utility
US 6,745,857 · App. 10/247,149
Method of drilling sub-sea oil and gas production wells
Inventor:
Jon Gjedebo
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Sep 19, 2002
Inventor
Jon Gjedebo
Assignee (at issue)
National Oilwell Norway AS
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.