Granted Patent
Utility
US 5,603,825 · App. 08/277,433
Multi-stage apparatus for separating immiscible fluids
Inventor:
Paul Costinel
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Jul 18, 1994
Inventor
Paul Costinel
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.