Granted Patent
Utility
US 5,256,255 · App. 07/856,859
Displacement heating in continuous digesters
Inventor:
Bertil K. E. Fagerlund
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Mar 24, 1992
Inventor
Bertil K. E. Fagerlund
Assignee (at issue)
Beloit Technologies, Inc.
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.