Granted Patent
Utility
US 4,331,644 · App. 06/037,030
Combustion catalyst and process for using same
Inventor:
James S. Ritscher
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: May 8, 1979
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.