Granted Patent
Utility
US 6,180,286 · App. 09/154,006
Lead-acid cells and batteries
Inventors:
Purushothama Rao, Thomas Uhlemann
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Sep 16, 1998
Inventors
Purushothama Rao
Thomas Uhlemann
Assignee (at issue)
GNB Technologies, 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.