Application of Charles H. Goodman, Edward K. Rice, Klaus Rosenstern and George W. Lenzie

ALMOND, Judge.

This is an appeal from the decision of the Board of Appeals affirming the rejection under 35 U.S.C. § 103 of all of the claims in appellants’ patent applieation. 1

The invention relates to the formation of hollow concrete slabs which are used as beams. The beams are formed by pouring concrete into a mold containing a central core element running the length of the mold. The concrete fills the void between the mold walls and the central core element. When the concrete is partially cured, the core element is removed by moving the outer walls of the core element inward, thus making…