Appeal No. 2002-2152
Application No. 08/701,764
in the claimed invention. In particular, Forde describes an x-
ray device for diagnosing and treating lesions of a pathological
nature occurring with various body cavities or orifices of the
human body. (Page 1, lines 44-54.) Although Forde discloses a
“thin-walled molybdenum cup 21” (element 21, Figure 8), there is
no teaching in this reference of a “conductive coating on the
external surface of the insulator, wherein...the conductive
coating is electrically connected to the cathode,” as required
by the appealed claims.
Tang’s teachings are equally ineffective to support the
examiner’s position. Tang describes an x-ray head including an
evacuated chamber in which an anode and a cathode are disposed
and electrical connections from the anode to the cathode extend
through the wall of the evacuated chamber. (Column 2, lines
2-7.) Tang teaches: “The anode 12 may be a metal foil separate
from the wall 10 or may be a metal film deposited on a part of
the inside surface of the wall 10 by vacuum evaporation or
another known technique.” (Column 4, lines 24-27.) Like Forde,
however, Tang lacks any teaching with respect to a “conductive
coating on the external surface of the insulator, wherein...the
conductive coating is electrically connected to the cathode,” as
required by the appealed claims.
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