Granted Patent
Utility
US 5,408,215 · App. 07/754,876
Catalyst monitoring using a hydrocarbon sensor
Inventor:
Douglas R. Hamburg
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Sep 4, 1991
Inventor
Douglas R. Hamburg
Assignee (at issue)
Ford Motor Company
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.