Appeal No. 2001-2138
Application No. 08/403,276
3. The naturally occurring steroid estrone has the following
stereochemistry:
(FIESER at 464.)
An atom or group that lies below the plane of the paper is depicted by a
dashed line leading to the group, and denoted “"” in the chemical name. An atom or
group that lies above the plane of the paper is depicted by a solid line, dark triangles or
thickened lines leading to the group, and denoted “$” in the chemical name. (May at 1085,
197 USPQ at 603.) Bonds to atoms or groups that can lie above or below the plane of the
paper are denoted by wavy lines. (Spec. at 3, ll.6–9.)
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