Granted Patent
Utility
US 4,594,152 · App. 06/636,785
Method and an apparatus for treating fibre suspensions
Inventor:
Johan Gullichsen
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Aug 1, 1984
Inventor
Johan 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.