Granted Patent
Utility
US 4,593,861 · App. 06/698,731
Apparatus for pulping paper making stock at high consistencies
Inventors:
Earl T. Blakley, Paul G. Marsh
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Dec 7, 1984
Inventors
Earl T. Blakley
Paul G. Marsh
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.