Granted Patent
Utility
US 4,692,214 · App. 06/665,910
Apparatus for producing mechanical pulp with a refiner having its drive shaft connected to a steam turbine output shaft
Inventor:
Bengt Nilsson
Patented Case
View Patent ↗
Granted: Sep 8, 1987
Filed: Oct 29, 1984
Inventor
Bengt Nilsson
Assignee (at issue)
Kamyr 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.