Granted Patent
Utility
US 5,246,576 · App. 07/624,948
Cathode in a layered circuit and electrochemical cell for a measurement of oxygen in fluids
Inventors:
Matthew J. Leader, Jeffery A. Graves
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Dec 10, 1990
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.