ALMOND, Judge.
Leo D. Miller appeals from a decision of the Patent Office Board of Appeals affirming the rejection of claim 18 in his application entitled "Soot Remover."
Appellant's invention relates to a soot-removing composition comprising a liquefied propellant gas having dispersed therein copper and/or lead salts of combustible organic aliphatic carboxylic acids. The composition is applied to the surface of a layer of soot...
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