Granted Patent
Utility
US 5,674,639 · App. 08/477,016
Separator for alkaline electrochemical cells
Inventor:
Lewis F. Urry
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Jun 7, 1995
Inventor
Lewis F. Urry
Assignee (at issue)
Eveready Battery Company, 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.