Granted Patent
Utility
US 4,297,328 · App. 06/080,132
Three-way catalytic process for gaseous streams
Inventors:
James S. Ritscher, Michael R. Sandner
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Sep 28, 1979
Inventors
James S. Ritscher
Michael R. Sandner
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.