Granted Patent
Utility
US 4,249,351 · App. 05/912,501
Self-erecting surge bin
Inventor:
J. Donald Brock
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Jun 5, 1978
Inventor
J. Donald Brock
Assignee (at issue)
Astec Industries, Inc.
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.