Granted Patent
Utility
US 5,851,350 · App. 08/771,064
Method and apparatus for pumping cellulose pulp
Inventor:
Jukka Timperi
Patented Case
View Patent ↗
Granted: Dec 22, 1998
Filed: Dec 20, 1996
Inventor
Jukka Timperi
Assignee (at issue)
A. Ahlstrom 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.