Granted Patent
Utility
US 6,558,844 · App. 09/774,441
Stabilized spinel battery cathode material and methods
Inventors:
Wilmont Frederick Howard, Jr., Stephen Sheargold, Phillip M. Story, Robert L. Peterson
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Jan 31, 2001
Inventors
Wilmont Frederick Howard, Jr.
Stephen Sheargold
Phillip M. Story
Robert L. Peterson
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.