Granted Patent
Utility
US 6,726,461 · App. 09/988,897
Screen pipe for dry forming web material
Inventors:
Paavo Hyvarinen, Heikki Niranen
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Nov 19, 2001
Inventors
Paavo Hyvarinen
Heikki Niranen
Assignee (at issue)
BKI Holding Corporation
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.