Granted Patent
Utility
US 4,368,920 · App. 06/179,978
Method of thermal-mine working of oil reservoir
Inventors:
Vladimir P. Tabakov, Alexandr I. Obrezkov
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Aug 21, 1980
Inventors
Vladimir P. Tabakov
Alexandr I. Obrezkov
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.