Granted Patent
Utility
US 4,170,571 · App. 05/864,835
Novel combustion catalyst
Inventor:
James S. Ritscher
Patented Case
View Patent ↗
Granted: Oct 9, 1979
Filed: Dec 27, 1977
Inventor
James S. Ritscher
Assignee (at issue)
Union Carbide Corporation
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.