Granted Patent
Utility
US 4,250,962 · App. 06/103,503
In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations
Inventors:
Ajay Madhav Madgavkar, Roger F. Vogel, Harold E. Swift
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Dec 14, 1979
Inventors
Ajay Madhav Madgavkar
Roger F. Vogel
Harold E. Swift
Assignee (at issue)
Gulf Research & Development 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.