Granted Patent
Utility
US 4,364,821 · App. 06/301,241
Fluid contacting process
Inventor:
Dennis E. O'Brien
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Sep 11, 1981
Inventor
Dennis E. O'Brien
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.