Granted Patent
Utility
US 4,266,539 · App. 06/039,235
Carbon dioxide scrubber and gas regenerator unit for a closed circuit rebreathing apparatus
Inventors:
Frederick A. Parker, Mark P. Grady, Jr.
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: May 15, 1979
Inventors
Frederick A. Parker
Mark P. Grady, Jr.
Assignee (at issue)
REXNORD GMBH
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.