Granted Patent
Utility
US 6,471,827 · App. 09/865,102
Method and device for measurement of the retention profile and for control of the retention in a paper/board machine
Inventors:
Juhana Lumiala, Antti Poikolainen, Ari Puurtinen, Mika Viertola
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: May 24, 2001
Inventors
Juhana Lumiala
Antti Poikolainen
Ari Puurtinen
Mika Viertola
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.