Appeal No. 1998-2103 Page 7
Application No. 08/674,243
surfaces. The electrodes are normally made from silver."
(Spec. at 1.) For its part, Corwin teaches an outer coating
15 of conductive material deposited with inherent internal
stress to place a ceramic shell 11 under initial compression.
Col. 2, ll. 60-62. Although the reference further teaches
that "the resultant coating is hard, corrosion resistant,
directly solderable, and has a high tensile strength," id. at
ll. 70-72, there is no evidence that the AAPA's electrodes
lack or would benefit from buttressing these qualities.
Because there is no evidence that the Corwin's outer
coating would have been desirable on AAPA's electrodes, we are
not persuaded that teachings from the prior art would have
suggested the combination. Therefore, we reverse the
rejection of claims 4-10 and 16-26 as obvious over AAPA in
view of Corwin.
CONCLUSION
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