Granted Patent
Utility
US 6,103,057 · App. 08/872,818
Kraft digesting process wherein a vapor interface is formed by withdrawing hot cooking liquor
Inventor:
Bertil K. E. Fagerlund
Patented Case
View Patent ↗
Granted: Aug 15, 2000
Filed: Jun 11, 1997
Inventor
Bertil K. E. Fagerlund
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.