Granted Patent
Utility
US 6,553,772 · App. 10/140,826
Apparatus for controlling the operation of a cryogenic liquefier
Inventors:
Paul W. Belanger, William R. Esposito, Thomas Edward Gajewski
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: May 9, 2002
Inventors
Paul W. Belanger
William R. Esposito
Thomas Edward Gajewski
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.