Granted Patent
Utility
US 5,215,372 · App. 07/657,539
Aggregate storage apparatus for use in producing asphaltic mix
Inventor:
John Milstead
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Feb 19, 1991
Inventor
John Milstead
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.