Granted Patent
Utility
US 5,874,186 · App. 08/872,811
Lead-acid cells and batteries
Inventors:
Purushothama Rao, Thomas Uhlemann
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Jun 11, 1997
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.