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IN RE FOSTER

Patent Appeal No. 3701.

86 F.2d 981 (1936)

In re FOSTER.

Court of Customs and Patent Appeals.

December 21, 1936.

Attorney(s) appearing for the Case

Forbes Silsby, of New York City (I. Harry Rosenberg, of New York City, of counsel), for appellant.

R. F. Whitehead, of Washington, D. C. (Howard S. Miller, of Washington, D. C., of counsel), for Commissioner of Patents.

Before GRAHAM, Presiding Judge, and BLAND, HATFIELD, GARRETT, and LENROOT, Associate Judges.

GARRETT, Associate Judge.

There are here involved four claims, numbered 21, 22, 23, and 24, for a method of purification of catalytic phthalic anhydride, an appeal having been taken to this court from the decision of the Board of Appeals of the United States Patent Office, affirming the decision of the Examiner rejecting them. Numerous claims stand allowed.

The appealed claims read:

"21. In the purification of catalytic phthalic anhydride, the steps...

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