Application of Elbert O. Thompson

KIRKPATRICK, Judge.

This appeal is from the decision of the Board of Appeals of the Patent Office affirming the examiner in his rejection of claims 7, 8, 15, 16 and 17 of a patent application, serial No. 411,510, filed by Elbert 0. Thompson for a “Method of Dentistry and Apparatus Therefor.” Broad method claims 20 to 24, inclusive, have been relinquished and all the claims now in issue are for apparatus.

The main purpose of the apparatus claimed, as set out in the specification, is the evacuation from the mouth of a patient undergoing dental treatment of a sufficient volume of water to allow…