Granted Patent
Utility
US 4,456,433 · App. 06/303,666
Method for assembling a single-flow turbomolecular vacuum pump, and a turbomolecular vacuum pump assembled by said method
Inventors:
Hans-Heinrich Henning, Hansen Pfaff
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Sep 18, 1981
Inventors
Hans-Heinrich Henning
Hansen Pfaff
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.