Granted Patent
Utility
US 4,346,563 · App. 06/266,573
Super critical helium refrigeration process and apparatus
Inventor:
Charles B. Hood
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: May 15, 1981
Inventor
Charles B. Hood
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.