Granted Patent
Utility
US 6,533,846 · App. 10/007,654
Modular pressure swing adsorption apparatus with clearance-type valve seals
Inventors:
Bowie G. Keefer, Christopher R. McLean, Les Jeziorowski, Kevin A. Kaupert, Marie Taponat, Christopher Stoner
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Dec 10, 2001
Inventors
Bowie G. Keefer
Christopher R. McLean
Les Jeziorowski
Kevin A. Kaupert
Marie Taponat
Christopher Stoner
Assignee (at issue)
QuestAir Technologies 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.