Granted Patent
Utility
US 4,294,668 · App. 06/158,843
Method of measuring oxygen and process for pretreating a solid electrolyte oxygen gas sensing element
Inventor:
Ching T. Young
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Jun 12, 1980
Inventor
Ching T. Young
Assignee (at issue)
Bendix Autolite Corp.
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.