Granted Patent
Utility
US 4,444,257 · App. 06/215,995
Method for in situ conversion of hydrocarbonaceous oil
Inventor:
Laurence O. Stine
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Dec 12, 1980
Inventor
Laurence O. Stine
Assignee (at issue)
UOP LLC
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.