Granted Patent
Utility
US 6,216,811 · App. 09/271,308
Acid retention system for a vehicle battery
Inventor:
Matthew J. Herc
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Mar 17, 1999
Inventor
Matthew J. Herc
Assignee (at issue)
Daimlerchrysler AG
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.