Granted Patent
Utility
US 4,934,590 · App. 07/353,052
Package closure
Inventors:
Arthur W. Robichaud, Charles D. Miller, Frank R. Wilgus
Patented Case
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Granted: Jun 19, 1990
Filed: May 17, 1989
Inventors
Arthur W. Robichaud
Charles D. Miller
Frank R. Wilgus
Assignee (at issue)
Combibloc, 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.