Granted Patent
Utility
US 4,810,374 · App. 07/187,122
Self-emptying centrifuge drum
Inventors:
Paul Bruning, Werner Kohlstette
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Apr 28, 1988
Inventors
Paul Bruning
Werner Kohlstette
Assignee (at issue)
Westfalia Separator 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.