Granted Patent
Utility
US 6,793,809 · App. 10/250,885
Pipe system for receiving and transporting lime sludge from a white liquor filter
Inventors:
Magnus Ingelman, Jan Tjernberg
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Nov 3, 2003
Inventors
Magnus Ingelman
Jan Tjernberg
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.