Granted Patent
Utility
US 6,179,958 · App. 09/117,593
Method for continuous cooking of cellulose-containing fibre material
Inventors:
Claes G. Lysen, Torbjorn Ulf Olsson, Gunnar Carl Wernqvist
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Jul 29, 1998
Inventors
Claes G. Lysen
Torbjorn Ulf Olsson
Gunnar Carl Wernqvist
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.