Granted Patent
Utility
US 5,090,873 · App. 07/452,006
Crankcase oil separator
Inventor:
Gary K. Fain
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Dec 18, 1989
Inventor
Gary K. Fain
Assignee (at issue)
Copeland LP
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.