Granted Patent
Utility
US 6,439,313 · App. 09/666,724
Downhole machining of well completion equipment
Inventors:
Hubertus V. Thomeer, James M. Costley, Randolph J. Sheffield, David Milton Eslinger, Marc Allcorn, Mark Callister Oettli
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Sep 20, 2000
Inventors
Hubertus V. Thomeer
James M. Costley
Randolph J. Sheffield
David Milton Eslinger
Marc Allcorn
Mark Callister Oettli
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.