Granted Patent
Utility
US 4,693,391 · App. 06/922,340
Closure having a pull tab and a controlled seal width at the pull tab
Inventor:
Donald J. Roth
Patented Case
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Granted: Sep 15, 1987
Filed: Oct 23, 1986
Inventor
Donald J. Roth
Assignee (at issue)
Continental Can Company, 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.