Granted Patent
Utility
US 4,325,806 · App. 06/222,468
Multiple stage hydrocarbon conversion with gravity flowing catalyst particles
Inventor:
Kenneth D. Peters
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Jan 5, 1981
Inventor
Kenneth D. Peters
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.