Granted Patent
Utility
US 5,222,365 · App. 07/840,268
Cryogenic rectification system for producing high pressure nitrogen product
Inventor:
Neno T. Nenov
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Feb 24, 1992
Inventor
Neno T. Nenov
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.