Granted Patent
Utility
US 5,355,809 · App. 08/012,363
Gasket for use on a railway hopper car outlet
Inventor:
Richard H. Dugge
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Feb 2, 1993
Inventor
Richard H. Dugge
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.