COLE, Judge.
The Primary Examiner of the United States Patent Office rejected, for lack of invention over the prior art of record, all of the claims accompanying the appellant's application for a patent for "Salt Bath Furnaces" and the Board of Appeals sustained that finding. This appeal therefrom involves claims 1, 6, 7, 9, and 11 drawn to the apparatus and claims 16, 17, 20, and 21 directed to the process.
Claims 1 and 16 are representative and read:
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