In re Tanczyn

ALMOND, Judge.

Harry Tanczyn appeals from a decision of the Board of Appeals affirming the rejection of all claims in appellant’s application.1 Appellant’s invention relates *831to a stainless steel of which claim 1 reproduced below is illustrative.

A chromium-nickel-aluminum stainless steel susceptible to precipitation-hardening by double heat-treatment from a soft, workable austenitic condition to give great strength in combination with good ductility, said steel consisting essentially of 9.00% to 20.00% chromium, 2.50% to 8.00% nickel, .70% to 2.50% aluminum, 1% to 5% molybdenum, with the sum of…