Granted Patent
Utility
US 4,853,006 · App. 07/206,104
Liquid deaerating apparatus
Inventor:
Keith Mangnall
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jun 13, 1988
Inventor
Keith Mangnall
Assignee (at issue)
Hick, Hargreaves & 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.