Granted Patent
Utility
US 4,370,087 · App. 06/206,581
Dumping apparatus for particulate-bearing container
Inventor:
James Shepard
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: Nov 13, 1980
Inventor
James Shepard
Assignee (at issue)
United States Steel Corporation
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.