Granted Patent
Utility
US 4,481,777 · App. 06/505,152
Cryogenic refrigerator
Inventor:
Domenico S. Sarcia
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jun 17, 1983
Inventor
Domenico S. Sarcia
Assignee (at issue)
CVI Incorporated
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.