Granted Patent
Utility
US 5,163,978 · App. 07/772,866
Dual product pressure swing adsorption process and system
Inventors:
Frederick Wells Leavitt, James Smolarek, Dale A. Lagree
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Oct 8, 1991
Inventors
Frederick Wells Leavitt
James Smolarek
Dale A. Lagree
Assignee (at issue)
Praxair Technology, Inc.
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.