Granted Patent
Utility
US 5,314,581 · App. 07/805,266
Apparatus for simulating processing parameters and predicting variables in a papermaking operation including sequential pulsation, gravity and vacuum drainage, fines retention and paper formation
Inventors:
John Lin, Michael Schuster, Richard A. Hobirk, Alan J. Schellhamer
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Dec 10, 1991
Inventors
John Lin
Michael Schuster
Richard A. Hobirk
Alan J. Schellhamer
Assignee (at issue)
Betz PaperChem 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.