Granted Patent
Utility
US 4,306,002 · App. 06/146,066
Multiple cell vent cap for a storage battery
Inventors:
Joseph I. Heiser, Terry Oxenreider
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: May 2, 1980
Inventors
Joseph I. Heiser
Terry Oxenreider
Assignee (at issue)
General Battery Corporation
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.