Granted Patent
Utility
US 4,589,197 · App. 06/726,661
Composite cathode for electrochemical cell
Inventor:
John M. North
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Apr 24, 1985
Inventor
John M. North
Assignee (at issue)
United Kingdom Atomic Energy Authority
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.