Granted Patent
Utility
US 4,259,844 · App. 06/061,919
Stacked disc heat exchanger for refrigerator cold finger
Inventors:
Domenico S. Sarcia, John T. Harvell, Robert M. Lewis
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Jul 30, 1979
Inventors
Domenico S. Sarcia
John T. Harvell
Robert M. Lewis
Assignee (at issue)
Helix 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.