Granted Patent
Utility
US 4,479,360 · App. 06/447,353
Cryopump
Inventors:
Werner B/a/ chler, Rolf Heisig
Patented Case
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Granted: Oct 30, 1984
Filed: Dec 6, 1982
Inventors
Werner B/a/ chler
Rolf Heisig
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.