Granted Patent
Utility
US 5,197,296 · App. 07/823,685
Cryogenic rectification system for producing elevated pressure product
Inventors:
Neil M. Prosser, Mark Julian Roberts
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Jan 21, 1992
Inventors
Neil M. Prosser
Mark Julian Roberts
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.