Application of Alvin E. Nehrenberg

SMITH, Judge.

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the rejection by the primary examiner of claims 1, 2 and 3 of appellant’s application No. 416,295 for a patent on a ferritic stainless steel. Claim 1, which is representative of the appealed claims, is as follows:

“A stainless and heat resistant steel of substantially homogeneous and ferritic structure consisting essentially of: 19 to 30% chromium, 0.2 to 1% each of silicon and manganese, 0.1 to 1% aluminum, up to 1% each of molybdenum and copper, 0.05 to 0.1% carbon, up to…