Granted Patent
Utility
US 6,426,019 · App. 09/545,670
Variable load refrigeration system particularly for cryogenic temperatures
Inventors:
Arun Acharya, Bayram Arman, Walter Joseph Olszewski, Dante Patrick Bonaquist, Joseph Alfred Weber
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Apr 7, 2000
Inventors
Arun Acharya
Bayram Arman
Walter Joseph Olszewski
Dante Patrick Bonaquist
Joseph Alfred Weber
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.