Granted Patent
Utility
US 4,412,909 · App. 06/336,266
Process for recovery of oil from shale
Inventors:
Bobby P. Faulkner, Michael H. Weinecke
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Dec 31, 1981
Inventors
Bobby P. Faulkner
Michael H. Weinecke
Assignee (at issue)
Allis-Chalmers Corporation
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.