Granted Patent
Utility
US 4,647,549 · App. 06/814,337
Regeneration of hydrocarbon conversion catalyst
Inventor:
Arthur R. Greenwood
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Dec 27, 1985
Inventor
Arthur R. Greenwood
Assignee (at issue)
UPO 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.