Granted Patent
Utility
US 5,336,411 · App. 07/934,503
Hydrocyclone assembly
Inventor:
Roine Andersson
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Oct 20, 1992
Inventor
Roine Andersson
Assignee (at issue)
Celleco-Hedemora 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.