Granted Patent
Utility
US 4,388,332 · App. 06/302,458
Heat treatment temperature indicating food package and process for providing same
Inventors:
Walter W. Egee, David A. Rickansrud
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Sep 15, 1981
Inventors
Walter W. Egee
David A. Rickansrud
Assignee (at issue)
Campbell Soup 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.