Granted Patent
Utility
US 4,957,523 · App. 07/425,363
High speed pressure swing adsorption liquid oxygen/liquid nitrogen generating plant
Inventors:
Robert A. Zarate, Richard E. Self, Lee Smith
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Oct 19, 1989
Inventors
Robert A. Zarate
Richard E. Self
Lee Smith
Assignee (at issue)
Pacific Consolidated Industries, LLC
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.