Granted Patent
Utility
US 5,019,144 · App. 07/540,313
Cryogenic air separation system with hybrid argon column
Inventors:
Richard A. Victor, Michael James Lockett, James R. Dray
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Jun 19, 1990
Inventors
Richard A. Victor
Michael James Lockett
James R. Dray
Assignee (at issue)
Union Carbide Industrial Gases Technology 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.