Granted Patent
Utility
US 4,228,945 · App. 06/017,603
Food carton for microwave heating
Inventor:
Lawrence S. Wysocki
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: Mar 5, 1979
Inventor
Lawrence S. Wysocki
Assignee (at issue)
Champion International Corporation Limited
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.