Granted Patent
Utility
US 5,611,902 · App. 08/355,423
Cathode in a layered circuit and electrochemical cell for measurement of oxygen in fluids
Inventors:
Matthew J. Leader, Jeffery A. Graves
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Dec 13, 1994
Inventors
Matthew J. Leader
Jeffery A. Graves
Assignee (at issue)
PPG Industries, 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.