In re Walker

This is an appeal from a decision of the Board of Appeals of the United States Patent Office which affirmed a decision of the examiner rejecting claims 14, 15, 17, and 18 of appellants’ application for a patent for a blowpipe nozzle. No claims were allowed.

*740Claim 14 is illustrative and reads as follows:

14. A blowpipe nozzle for removing surface metal from ferrous metal bodies by reaction witb an oxidizing gas stream applied to tbe surface thereof, said nozzle having an oxidizing gas passage extending axially therethrough, said passage having an inlet and an outlet of greater cross-sectional…