Granted Patent
Utility
US 4,422,152 · App. 06/323,073
Automatic fixed-quantity/variable-time anti-oxidation replenisher control system
Inventor:
Kenneth M. Kaufmann
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Nov 19, 1981
Inventor
Kenneth M. Kaufmann
Assignee (at issue)
Pako Corporation
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.