Granted Patent
Utility
US 6,159,337 · App. 09/414,887
Dissolved organic materials control in cellulose pulp production
Inventors:
Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Joseph R. Phillips, Rolf Ryham, Jan T. Richardsen, R. Fred Chasse
Patented Case
View Patent ↗
Granted: Dec 12, 2000
Filed: Oct 8, 1999
Inventors
Bruno Marcoccia
J. Robert Prough
Richard O. Laakso
Joseph R. Phillips
Rolf Ryham
Jan T. Richardsen
R. Fred Chasse
Assignee (at issue)
Andritz-Ahlstrom 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.