Granted Patent
Utility
US 4,838,443 · App. 07/152,150
Vacuum discharge bin for bulk materials
Inventors:
Gene F. Cripe, Robert W. Luebbe, Andrew W. Snyder
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Feb 4, 1988
Inventors
Gene F. Cripe
Robert W. Luebbe
Andrew W. Snyder
Assignee (at issue)
Thomas Conveyor Company
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.