Granted Patent
Utility
US 6,729,402 · App. 10/251,742
Method of recovering hydrocarbon fluids from a subterranean reservoir
Inventors:
Kin-Tai Chang, Harry Frampton, James C. Morgan
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Sep 20, 2002
Inventors
Kin-Tai Chang
Harry Frampton
James C. Morgan
Assignee (at issue)
Ondeo Nalco Energy Services, 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.