Granted Patent
Utility
US 5,753,339 · App. 08/694,587
Catalytic converter substrate with a plurality of cell groups having high and low thermal mass walls
Inventor:
Slater W. Hawes
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Aug 9, 1996
Inventor
Slater W. Hawes
Assignee (at issue)
General Motors LLC
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.