Granted Patent
Utility
US 5,814,187 · App. 08/045,684
Apparatus and method for treating a pulp slurry of waste paper
Inventor:
Roland Fjallstrom
Patented Case
View Patent ↗
Granted: Sep 29, 1998
Filed: Apr 14, 1993
Inventor
Roland Fjallstrom
Assignee (at issue)
Alfa Laval Celleco 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.