Granted Patent
Utility
US 4,362,213 · App. 06/208,214
Method of in situ oil extraction using hot solvent vapor injection
Inventor:
Paul Tabor
Patented Case
View Patent ↗
Granted: Dec 7, 1982
Filed: Nov 19, 1980
Inventor
Paul Tabor
Assignee (at issue)
Hydrocarbon Research, Inc.
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.