Granted Patent
Utility
US 6,190,441 · App. 09/455,832
Pressure swing absorption system with multi-chamber canister
Inventors:
Michael P. Czabala, Robert W. Murdoch
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Dec 6, 1999
Inventors
Michael P. Czabala
Robert W. Murdoch
Assignee (at issue)
Respironics Georgia, 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.