Granted Patent
Utility
US 4,334,989 · App. 06/221,140
Fuel-water separator with piston-check valve water disposal to evaporator
Inventor:
John F. Hall
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Dec 29, 1980
Inventor
John F. Hall
Assignee (at issue)
Chrysler Group LLC
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.