Granted Patent
Utility
US 6,193,180 · App. 09/319,313
Arrangement in a pulp grinder
Inventors:
Pekka Haikkala, Jouko Hautala, Heikki Liimatainen, Kari Parssinen, Simo Setala, Olli Tuovinen
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Jul 12, 1999
Inventors
Pekka Haikkala
Jouko Hautala
Heikki Liimatainen
Kari Parssinen
Simo Setala
Olli Tuovinen
Assignee (at issue)
Valmet Aktiebolag
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.