Granted Patent
Utility
US 5,053,294 · App. 07/506,748
Planar sodium-sulfur electrical storage cell
Inventors:
Richard P. Sernka, Robert K. Taenaka
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Apr 10, 1990
Inventors
Richard P. Sernka
Robert K. Taenaka
Assignee (at issue)
Hughes Aircraft Company
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.