Granted Patent
Utility
US 4,286,028 · App. 06/107,113
Snap-through anti-ignition vent cap for lead acid storage batteries
Inventors:
Joseph I. Heiser, Edgar M. Erb
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Dec 26, 1979
Inventors
Joseph I. Heiser
Edgar M. Erb
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.