Granted Patent
Utility
US 6,012,744 · App. 09/071,253
Heavy weight drill pipe
Inventors:
Gerald E. Wilson, R. Thomas Moore, Wei Tang
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: May 1, 1998
Inventors
Gerald E. Wilson
R. Thomas Moore
Wei Tang
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.