Granted Patent
Utility
US 4,296,860 · App. 06/098,066
Bulk material box
Inventors:
Fu-Tong Hsu, John F. Kantz
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Nov 28, 1979
Inventors
Fu-Tong Hsu
John F. Kantz
Assignee (at issue)
Union Carbide 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.