Granted Patent
Utility
US 4,285,122 · App. 06/130,241
Heat-treated, organic solvent-treated manganese dioxide
Inventor:
Akiya Kozawa
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Mar 14, 1980
Inventor
Akiya Kozawa
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.