Granted Patent
Utility
US 4,275,815 · App. 06/053,993
Lid
Inventor:
Paul Davis
Patented Case
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Granted: Jun 30, 1981
Filed: Jul 2, 1979
Inventor
Paul Davis
Assignee (at issue)
Sweetheart Plastics, 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.