Granted Patent
Utility
US 5,755,657 · App. 08/628,663
Centrifugal oil filter
Inventor:
Matthew Millson
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Apr 12, 1996
Inventor
Matthew Millson
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.