Granted Patent
Utility
US 5,375,426 · App. 08/175,552
Process to clean a lubricated vapor compression refrigeration system by using carbon dioxide
Inventor:
David Burgener
Patented Case
View Patent ↗
Granted: Dec 27, 1994
Filed: Dec 30, 1993
Inventor
David Burgener
Assignee (at issue)
Air Liquide America Corporation
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.