LENROOT, Associate Judge.
This appeal brings before us for review a decision of the Board of Appeals of the United States Patent Office affirming a decision of the examiner rejecting, for lack of patentability over the cited prior art, claims 7 to 11, inclusive, of appellant's application for a patent. No claims were allowed:
Claim 7 is illustrative and reads as follows:
"7. A closure for sealing packing receptacles, comprising a shell having a top...
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