Granted Patent
Utility
US 5,389,471 · App. 08/218,489
Wettable battery separator for alkaline batteries
Inventor:
James K. Kung
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Mar 28, 1994
Inventor
James K. Kung
Assignee (at issue)
W.R. Grace & Co. Conn.
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.