Granted Patent
Utility
US 6,423,185 · App. 09/623,692
Process of surface treatment for faces that become contaminated in a paper or board machine
Inventors:
Tapio Mäntylä, Pentti Lehtonen, Petri Sorsa
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Nov 24, 2000
Inventors
Tapio Mäntylä
Pentti Lehtonen
Petri Sorsa
Assignee (at issue)
Metso Paper 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.