Granted Patent
Utility
US 5,169,413 · App. 07/772,336
Low temperature pressure swing adsorption with refrigeration
Inventor:
Frederick Wells Leavitt
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Oct 7, 1991
Inventor
Frederick Wells Leavitt
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.