Granted Patent
Utility
US 5,729,993 · App. 08/633,150
Precooled vapor-liquid refrigeration cycle
Inventors:
Mikhail Boiarski, Oleg Podcherniaev
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Apr 16, 1996
Inventors
Mikhail Boiarski
Oleg Podcherniaev
Assignee (at issue)
APD Cryogenics, 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.