Granted Patent
Utility
US 4,344,840 · App. 06/232,787
Hydrocracking and hydrotreating shale oil in multiple catalytic reactors
Inventor:
John G. Kunesh
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: Feb 9, 1981
Inventor
John G. Kunesh
Assignee (at issue)
Hydrocarbon Research, 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.