Granted Patent
Utility
US 4,419,373 · App. 06/363,072
Method of heating contents in a self venting container
Inventor:
Walter Oppermann
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Mar 29, 1982
Inventor
Walter Oppermann
Assignee (at issue)
American Can 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.