Granted Patent
Utility
US 4,892,619 · App. 07/177,472
Method of production of fiber containing pulp with different raw materials
Inventor:
Goran Tistad
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Apr 1, 1988
Inventor
Goran Tistad
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.