Granted Patent
Utility
US 4,711,009 · App. 06/830,698
Process for making metal substrate catalytic converter cores
Inventors:
Richard C. Cornelison, William B. Retallick
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Feb 18, 1986
Inventors
Richard C. Cornelison
William B. Retallick
Assignee (at issue)
W. R. Grace & Co.
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.