Granted Patent
Utility
US 5,853,199 · App. 08/529,517
Fatigue resistant drill pipe
Inventor:
Gerald E. Wilson
Patented Case
View Patent ↗
Granted: Dec 29, 1998
Filed: Sep 18, 1995
Inventor
Gerald E. Wilson
Assignee (at issue)
GRANT PRIDECO, 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.