Appeal No. 2002-0510 Page 19
Application No. 09/139,309
electrical impedance values in response to an excessive or overstress voltage
pulse, thereby shunting the excessive voltage or overstress pulse to ground." Col. 1,
ll. 17-25. The reference's composition comprises a binder having dispersed therein at
least 55% by volume of conductive or semiconductive particles. More specifically, "[i]n
the practice of [Hyatt's] invention, the key electrical ingredient of the composite is a
mixture of conductor/semiconductor particles, constituting from about 55 to about 80%,
and preferably from about 60 to about 70%, by volume of the composite." Col. 5, ll. 20-
24.
We find that when the composition of Hyatt was used in the device of Slepian,
the combination would have featured at least three layers, wherein each layer would
have featured a percentage loading of at least about 55% by volume of conductive or
semiconductive particles. Such a loading would have satisfied the requirement that a
first and third layer feature a percentage loading of at least about 20% by volume of
conductive or semiconductive particles and that a second layer features a percentage
loading of at least about 40% by volume of conductive or semiconductive particles.
Therefore, we affirm the obviousness rejection of claim 11 and of claims 12-16, which
fall therewith, over Slepian and Hyatt.
Obviousness Rejection of Claims 11-20 over Downing and Hyatt
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