Granted Patent
Utility
US 4,789,609 · App. 07/133,592
Battery separator
Inventors:
Geneva Ambrose-Ritchey, Felek Jachimowicz, Joseph T. Lundquist
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Dec 14, 1987
Inventors
Geneva Ambrose-Ritchey
Felek Jachimowicz
Joseph T. Lundquist
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.