Granted Patent
Utility
US 4,523,255 · App. 06/533,678
Cathode for an electrolytic capacitor
Inventor:
Donald Rogers
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Sep 19, 1983
Inventor
Donald Rogers
Assignee (at issue)
Sprague Electric 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.