Granted Patent
Utility
US 5,185,014 · App. 07/787,953
Membrane oxygen process and system
Inventor:
Ravi Prasad
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Nov 5, 1991
Inventor
Ravi Prasad
Assignee (at issue)
Praxair Technology, 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.