Granted Patent
Utility
US 6,745,845 · App. 10/016,467
Isolation of subterranean zones
Inventors:
Robert Lance Cook, Lev Ring, Kevin Waddell, David Paul Brisco
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Dec 10, 2001
Inventors
Robert Lance Cook
Lev Ring
Kevin Waddell
David Paul Brisco
Assignee (at issue)
SHELL OIL COMPANY
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.