O'CONNELL, Associate Judge.
This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the action of the Primary Examiner in his rejection of claims 21, 23, and 24, being all the claims in appellants' application for a patent for alleged "new and useful improvements in Casting of Non-ferrous Metals."
The rejection was based upon the ground that the appealed claims lacked invention over the disclosure of the patent...
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