Granted Patent
Utility
US 4,969,264 · App. 07/156,838
Catalytic converter and substrate support
Inventors:
Leonard J. Dryer, Thomas J. Schwarte
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Apr 1, 1988
Inventors
Leonard J. Dryer
Thomas J. Schwarte
Assignee (at issue)
Tennessee Gas Pipeline 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.