Granted Patent
Utility
US 5,904,821 · App. 08/900,267
Fused chloride salt electrolysis cell
Inventors:
Howard M. Blank, Oswald Robert Bergmann, Walter John Simmons
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Jul 25, 1997
Inventors
Howard M. Blank
Oswald Robert Bergmann
Walter John Simmons
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.