Granted Patent
Utility
US 6,620,539 · App. 09/797,332
Fuel cell cathodes and their fuel cells
Inventors:
Stanford R. Ovshinsky, Boyko Aladjov, Srinivasan Venkatesan, Subhash Dhar
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Mar 1, 2001
Inventors
Stanford R. Ovshinsky
Boyko Aladjov
Srinivasan Venkatesan
Subhash Dhar
Assignee (at issue)
Energy Conversion Devices, 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.