Granted Patent
Utility
US 4,170,527 · App. 05/955,314
Production of electrolytic manganese dioxide
Inventors:
Henri B. Beer, Theo Muller
Patented Case
View Patent ↗
Granted: Oct 9, 1979
Filed: Oct 27, 1978
Inventors
Henri B. Beer
Theo Muller
Assignee (at issue)
Diamond Shamrock Technologies S.A.
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.