Granted Patent
Utility
US 6,591,908 · App. 09/934,963
Hydrocarbon production process with decreasing steam and/or water/solvent ratio
Inventor:
Tawfik N. Nasr
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Aug 22, 2001
Inventor
Tawfik N. Nasr
Assignee (at issue)
Alberta Science and Research Authority
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.