Granted Patent
Utility
US 5,286,520 · App. 07/806,177
Preparation of fluorine-doped tungstic oxide
Inventor:
James W. Proscia
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Dec 13, 1991
Inventor
James W. Proscia
Assignee (at issue)
Ford Motor 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.