Granted Patent
Utility
US 4,952,766 · App. 07/181,494
Sensor and pop detector for microwave popcorn control
Inventor:
Charles W. McDonald
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Apr 14, 1988
Inventor
Charles W. McDonald
Assignee (at issue)
Microwave Products of America, 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.