Granted Patent
Utility
US 4,437,798 · App. 06/351,052
Valve for discharge outlet and actuating means therefore
Inventor:
Dennis J. Schipper
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Feb 22, 1982
Inventor
Dennis J. Schipper
Assignee (at issue)
ACF Industries Incorporated
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.