Granted Patent
Utility
US 4,650,649 · App. 06/820,058
Catalyst recovery process
Inventor:
Joseph Robert Zoeller
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Jan 21, 1986
Inventor
Joseph Robert Zoeller
Assignee (at issue)
EASTMAN KODAK COMPANY
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.