Granted Patent
Utility
US 4,908,281 · App. 07/248,383
Metal/air battery with recirculating electrolyte
Inventor:
Wilfrid B. O'Callaghan
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Sep 23, 1988
Inventor
Wilfrid B. O'Callaghan
Assignee (at issue)
Alcan International Limited
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.