Granted Patent
Utility
US 5,314,094 · App. 08/055,685
Cloth fluidizing membrane for hopper car outlet
Inventors:
Roger Dalske, Dennis J. Schipper, David M. Maechling
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Apr 29, 1993
Inventors
Roger Dalske
Dennis J. Schipper
David M. Maechling
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.