Granted Patent
Utility
US 4,853,095 · App. 07/165,752
Conversion of manganese dioxide to permanganate
Inventor:
Joseph J. D'Ambrisi
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Mar 9, 1988
Inventor
Joseph J. D'Ambrisi
Assignee (at issue)
MacDermid, Incorporated
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.