Granted Patent
Utility
US 5,964,221 · App. 08/735,847
Rebreather adsorbent system
Inventor:
Douglas B. McKenna
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Oct 23, 1996
Inventor
Douglas B. McKenna
Assignee (at issue)
Gore Enterprise Holdings, 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.