Granted Patent
Utility
US 4,797,244 · App. 06/644,056
Multiwalled container and method of making same
Inventor:
Donald G. Sauer
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Aug 23, 1984
Inventor
Donald G. Sauer
Assignee (at issue)
American National 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.