Granted Patent
Utility
US 5,586,965 · App. 08/439,273
Centrifugal separator with conical bowl section and axially spaced recesses
Inventor:
Benjamin V. Knelson
Patented Case
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Granted: Dec 24, 1996
Filed: May 11, 1995
Inventor
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.