Application of Lionel Alexander Bethune Pilkington

WORLEY, Chief Judge.

This appeal is from a decision of the Board of Appeals affirming the rejec tions of the only claim in appellant’s application 1 under 35 U.S.C. § 103 and as an improper product-by-process claim.

Appellant is the inventor of the “float glass” process for making sheet glass. 2 According to the specification, a ribbon of glass is drawn onto the horizontal surface of a bath of molten metal, considerably wider than the ribbon and is then heated above its melting point. The glass liquefies and, under the influence of gravitational and surface tension forces, flows freely across…