Appeal 2007-4307
Application 10/173,095
mattes 40, 42 are commingled fibers of graphite and a thermoplastic resin
(e.g., PEEK), interleaved with films 44, 46. The layers are heated under
pressure in a mold until the material is cured.45
The examiner relies on Andre and admitted prior art to teach the
claimed process apart from the interposing step. As previously discussed in
the claim construction, we do not understand Airbus to be contesting that the
other steps are in the prior art. Had the examiner enforced § 1.75(e), his
burden in making the rejection would have been much simpler.
Rostami relates to polymer compositions, particularly those
containing polysulphones.46 According to Rostami, polysulphones and
polyketones do not make good polymer blends, but adding a polyimide
unexpectedly provides improved properties.47 Such compositions may be
used as the resin for making fiber-reinforced products, where the eligible
fibers include fiberglass and graphite.48 The compositions and fiber-
reinforced products are good for applications where heat- and chemical-
resistance are needed.49 Rostami's EXAMPLE 1 involves blending a
polysulphone with PEEK (a polyketone) and PEI (a polyimide).
Differences between the prior art and the claimed subject matter
Riel, Andre, and the admitted prior art do not teach the interposing
step. Stephens, Chee, and Scanlon are concerned with making resin-fiber
face sheets rather than improved bonding between the metal cloth and the
45 Scanlon 4:26-46.
46 Rostami 1:8-14.
47 Rostami 1:58-2:5.
48 Rostami 7:10-23 and 7:60-8:4.
49 Rostami 8:49-53.
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