KIRKPATRICK, Judge.
This is an appeal from the decision of the Patent Office Board of Appeals affirming the examiner's Section 103 rejection of claims 1 to 10, being all the claims in Application Serial No. 824,962, filed July 6, 1959.
The invention concerns a rigid, foamed plastic board used in the construction industry chiefly for insulation around the perimeters of slab floor construction. Claim 1 is representative and is as follows:
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