Granted Patent
Utility
US 6,074,336 · App. 09/142,637
Separator with control valve and interlock device
Inventor:
Ronald J. Purvey
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Sep 10, 1998
Inventor
Ronald J. Purvey
Assignee (at issue)
The Glacier Metal Company Limited
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.