Granted Patent
Utility
US 4,604,336 · App. 06/626,104
Manganese dioxide and process for the production thereof
Inventor:
John C. Nardi
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Jun 29, 1984
Inventor
John C. Nardi
Assignee (at issue)
Union Carbide Corporation
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.