Granted Patent
Utility
US 4,559,068 · App. 06/640,827
Arrangement for the separation of particles
Inventors:
Jan. E. R. Lagerstedt, Helge Andersson
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Aug 15, 1984
Inventors
Jan. E. R. Lagerstedt
Helge Andersson
Assignee (at issue)
Tetra Pak International 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.