Application of Robert B. Gordon and Walter J. Hurford

RICH, Judge.

This appeal is from the decision of the Patent Office Board of Appeals affirming the rejection of claims 1, 2, 4, 5, 6, 9 and 10 in the application of Robert B. Gordon and Walter J. Hurford, Ser. No. 367,524 filed July 13, 1953, entitled “Method of Producing Sound and Homogeneous Ingots.” The sole issue is patentability over the following references:

Rohn 1,555,313 Sept. 29, 1925 Her res

et al. 2,541,764 Feb. 13, 1951

Herres 2,640,860 June 2, 1953

Appellants’ specification discusses the background of their invention as follows:

“Considerable difficulties have been encountered in…