Granted Patent
Utility
US 4,668,341 · App. 06/792,296
Method and apparatus for producing mechanical pulp with a steam turbine driven refiner
Inventor:
Bengt Nilsson
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Oct 28, 1985
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.