Granted Patent
Utility
US 5,201,472 · App. 07/902,759
Method for preparing and storing a recyclable shingle material
Inventor:
J. Don Brock
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Jun 23, 1992
Inventor
J. Don 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.