Granted Patent
Utility
US 5,335,426 · App. 07/949,047
Method and apparatus for thermal regeneration of molecular sieve material used in oxygen concentrators
Inventors:
Bernard W. Settlemyer, William A. Johnson, Robert L. Johnson
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Sep 22, 1992
Inventors
Bernard W. Settlemyer
William A. Johnson
Robert L. Johnson
Assignee (at issue)
Foothills Medical Equipment, 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.