Granted Patent
Utility
US 5,401,411 · App. 07/934,502
Hydrocyclone plant
Inventor:
Roine Andersson
Patented Case
View Patent ↗
Granted: Mar 28, 1995
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.