Granted Patent
Utility
US 4,895,778 · App. 06/912,697
Method of purifying electrolytes of alkali metal batteries
Inventor:
David Nalewajek
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Sep 29, 1986
Inventor
David Nalewajek
Assignee (at issue)
AlliedSignal, Inc.
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.