Granted Patent
Utility
US 6,006,838 · App. 09/169,910
Apparatus and method for stimulating multiple production zones in a wellbore
Inventors:
T. G. Whiteley, Douglas J. Lehr, Michael A. Martin, Dennis Atchley
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Oct 12, 1998
Inventors
T. G. Whiteley
Douglas J. Lehr
Michael A. Martin
Dennis Atchley
Assignee (at issue)
BJ SERVICES, LLC
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.