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APPLICATION OF YANT

Patent Appeal No. 4950.

146 F.2d 304 (1944)

Application of YANT.

Court of Customs and Patent Appeals.

December 11, 1944.

Attorney(s) appearing for the Case

Brown, Critchlow & Flick, of Pittsburgh, Pa. (Frank E. Foote and Fulton B. Flick, both of Pittsburgh, Pa., of counsel), for appellant.

W. W. Cochran, of Washington, D. C. (R. F. Whitehead, of Washington, D. C., of counsel), for Commissioner of Patents.

Before GARRETT, Presiding Judge, and BLAND, HATFIELD, JACKSON, and O'CONNELL, Associate Judges.

BLAND, Associate Judge.

From a decision of the Board of Appeals of the United States Patent Office, affirming that of the Primary Examiner in rejecting claims 18, 19, and 20 of appellant's application for a patent relating to an improvement in filters, appeal has been taken here.

Claim 18 is sufficiently illustrative and reads: "18. In a breathing apparatus adapted to remove particulate matter from air to render it fit for breathing, the combination of a facepiece...

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