Granted Patent
Utility
US 6,059,944 · App. 09/124,441
Diaphragm for electrolytic cell
Inventors:
Donald W. DuBois, Bernard A. Maloney, Jerry N. Kinney
Patented Case
View Patent ↗
Granted: May 9, 2000
Filed: Jul 29, 1998
Inventors
Donald W. DuBois
Bernard A. Maloney
Jerry N. Kinney
Assignee (at issue)
PPG Industries Ohio, Inc.
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.