In re de Seversky

RICH, Judge.

This appeal is from the decision of the Patent Office Board of Appeals, adhered to on reconsideration, affirming the rejection of claims 1 and 10 of appellant’s application serial No. 723,810, filed April 24, 1968, entitled “Multi-Con-centric Wet Electrostatic Precipitator,” for obviousness under 35 U.S.C. § 103. We affirm.

Generally, the wet precipitator includes two concentric cylinders which define an annular space between them. Contaminated air or gas to be cleaned is directed through this annular space. Water is caused to flow on the inside surface of the outer cylinder as…