Granted Patent
Utility
US 4,940,593 · App. 07/342,155
Multicolored R-T-E cereal and method of preparation
Inventor:
David Klaus Duffy
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Apr 24, 1989
Inventor
David Klaus Duffy
Assignee (at issue)
General Mills, 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.