Granted Patent
Utility
US 6,205,812 · App. 09/453,297
Cryogenic ultra cold hybrid liquefier
Inventors:
Arun Acharya, John Henri Royal, Christian Fredrich Gottzmann, Dante Patrick Bonaquist, Bayram Arman
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Dec 3, 1999
Inventors
Arun Acharya
John Henri Royal
Christian Fredrich Gottzmann
Dante Patrick Bonaquist
Bayram Arman
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.