Granted Patent
Utility
US 5,093,213 · App. 07/640,531
Metal-air battery with recirculating electrolyte
Inventor:
Wilfrid B. O'Callaghan
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Jan 10, 1991
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.