Granted Patent
Utility
US 5,192,396 · App. 07/765,004
Process for the continuous digestion of cellulosic fiber material
Inventor:
Ake Backlund
Patented Case
View Patent ↗
Granted: Mar 9, 1993
Filed: Sep 24, 1991
Inventor
Ake Backlund
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.