Granted Patent
Utility
US 5,200,590 · App. 07/803,257
Apparatus and method for making microwave popcorn
Inventors:
Robert F. Bowen, Robert J. Castoldi, John S. Sklenak
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Dec 5, 1991
Inventors
Robert F. Bowen
Robert J. Castoldi
John S. Sklenak
Assignee (at issue)
Raytheon Company
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.