Granted Patent
Utility
US 5,152,871 · App. 07/647,507
Method for decreasing energy consumption during refining of fiber material while maintaining capacity
Inventor:
Jonan Gullichsen
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Jan 29, 1991
Inventor
Jonan Gullichsen
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.