Granted Patent
Utility
US 4,396,509 · App. 06/221,810
Device for extraction of liquid from suspensions in movement
Inventor:
Tore Foyn
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Dec 31, 1980
Inventor
Tore Foyn
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.