Granted Patent
Utility
US 5,266,168 · App. 07/813,899
Gravity type pulp washer or thickener with rotating disrupters
Inventor:
David E. Suica
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Dec 20, 1991
Inventor
David E. Suica
Assignee (at issue)
Black Clawson Company, Inc.
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.