Granted Patent
Utility
US 4,401,730 · App. 06/304,475
Sealed deep cycle lead acid battery
Inventors:
Joseph Szymborski, Sudhansu S. Misra, Mark L. Eggers, Brian W. Burrows
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Sep 22, 1981
Inventors
Joseph Szymborski
Sudhansu S. Misra
Mark L. Eggers
Brian W. Burrows
Assignee (at issue)
GNB Batteries 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.