Granted Patent
Utility
US 4,338,186 · App. 06/207,537
Shale oil process
Inventors:
Henry E. Reif, Jeffrey P. Schwedock
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Nov 17, 1980
Inventors
Henry E. Reif
Jeffrey P. Schwedock
Assignee (at issue)
SUNTEC CO., LTD.
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.