In re Magerlein

MILLER, Judge.

This is an appeal from the decision of the Patent and Trademark Office (“PTO”) Board of Appeals (“board”) affirming the rejection under 35 U.S.C. § 103 of claims 27-41. We reverse.

Background

Employing the synthesizing methods of the prior art (hereinafter “Corey”),1 appellant has synthesized C-16 dimethyl homo-*368logs of natural prostaglandins.2 Appellant’s synthesis uses chemical intermediates which are dimethyl homologs of the Corey intermediates. These intermediates are the subject matter of the claims on appeal.3 The Corey intermediates are productive of pharmaceutically useful…