Granted Patent
Utility
US 4,408,469 · App. 06/328,152
Refrigerator cryostat
Inventor:
Hans-Joachim Forth
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Dec 7, 1981
Inventor
Hans-Joachim Forth
Assignee (at issue)
Leybold-Heraeus GmbH
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.