Granted Patent
Utility
US 6,581,980 · App. 09/560,854
Threaded connection with high compressive rating
Inventors:
Richard W. DeLange, Merle E. Evans, Darrell Scott Costa, Reji Eason
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Apr 28, 2000
Inventors
Richard W. DeLange
Merle E. Evans
Darrell Scott Costa
Reji Eason
Assignee (at issue)
GRANT PRIDECO, L.P.
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.