Granted Patent
Utility
US 5,222,933 · App. 07/869,071
Centrifual discharge of concentrate
Inventors:
Benjamin V. Knelson, Andre Cauchon
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Mar 20, 1992
Inventors
Benjamin V. Knelson
Andre Cauchon
Assignee (at issue)
Benjamin V. Knelson
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.