Granted Patent
Utility
US 6,457,954 · App. 09/700,483
Frictional vacuum pump with chassis, rotor, housing and device fitted with such a frictional vacuum pump
Inventors:
Ralf Adamietz, Christian Beyer, Gunter Schutz
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Nov 15, 2000
Inventors
Ralf Adamietz
Christian Beyer
Gunter Schutz
Assignee (at issue)
LEYBOLD VAKUUM 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.