Granted Patent
Utility
US 6,167,966 · App. 09/148,682
Toe-to-heel oil recovery process
Inventors:
Conrad Ayasse, Alex Turta
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: Sep 4, 1998
Inventors
Conrad Ayasse
Alex Turta
Assignee (at issue)
Alberta Research Council 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.