Granted Patent
Utility
US 5,558,139 · App. 08/388,342
Liquid oxygen system
Inventor:
Fred P. Snyder
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Feb 13, 1995
Inventor
Fred P. Snyder
Assignee (at issue)
Essex Cryogenics of Missouri, 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.