Granted Patent
Utility
US 6,156,159 · App. 09/407,277
Device for mixing of a fluid into a pulp-suspension
Inventors:
Rolf Ekholm, Ulf Jansson, Per Johan Anders Nyström
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Sep 29, 1999
Inventors
Rolf Ekholm
Ulf Jansson
Per Johan Anders Nyström
Assignee (at issue)
Kvaerner Pulping AB
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.