Granted Patent
Utility
US 6,138,836 · App. 09/440,027
Blade arrangement for pulp screening apparatus
Inventor:
Juhani Valli
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Nov 12, 1999
Inventor
Juhani Valli
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.