Appeal No. 1997-3769
Application 08/418,257
Encyclopedia of Chemical Technology as “materials that resist 3
the action of hot environments by containing heat energy...the
ability to withstand temperatures above 1100E C without
softening has been cited as a practical requirement of
industrial refractory materials.” It does not appear that
aluminum would be in this category of a material which could
withstand 1100E C without softening. At page 11 of the Kirk-
Othmer Encyclopedia, Vol. 20, it is indicated that the
highest-melting refractory metals are tungsten, tantalum and
molybdenum. Further, aluminum is not envisioned by the
instant application as the claimed refractory metal because
that layer would then be subject to the same changes as the
aluminum deposited during the step of raising the temperature.
It is clear that aluminum cannot constitute the claimed
“refractory metal” layer. Thus, the applied prior art does
not suggest the claimed step of “during said step of raising
the temperature, beginning to deposit aluminum on the layer
including the
refractory metal.” Thus, we will not sustain the rejection of
3Kirk-Othmer, Third Edition, Volume 20, page 1, 1982.
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