Granted Patent
Utility
US 4,474,586 · App. 06/557,979
Gas separation process
Inventor:
Arthur W. Rice
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Dec 5, 1983
Inventor
Arthur W. Rice
Assignee (at issue)
Monsanto Company
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.