Appeal No. 2003-2020
Application No. 08/944,208
used, or a mixture of two or more of the disclosed polymers,
including the ABS resin and polycarbonate resin, may be used.
Yamamoto discloses (column 3, lines 44-47) adding an anionic
monomer to the thermoplastic resin as the antistatic property-
imparting component. Since Yamamoto and Kato disclose the same
base polymers, it would have been obvious to add the antistatic
component of Yamamoto to Kato's disk cartridge composition to
give the disk cartridge antistatic properties.
Appellants argue (Brief, page 6) that Kato and Yamamoto "do
not suggest the inventive cartridges" since they do not suggest
that a disk cartridge made as recited in claim 13 "would exhibit
excellent heat-resistance, rigidity and anti-static properties."
We disagree. As explained supra, Kato discloses a disk cartridge
using two resins for better heat-resistance along with an
inorganic filler for rigidity. Thus, Kato discloses all of the
claimed elements and their properties except for the antistatic
component. However, Yamamoto teaches adding an antistatic
component to a mixture of resins like those used by Kato.
Therefore, the combination does suggest that a disk cartridge
made as recited in claim 13 would exhibit the above properties.
Appellants contend (Brief, page 7) that the claimed mixture
provides an added feature of remaining fluid at low temperatures,
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