Appeal No. 96-1950
Application No. 08/099,929
34). Since this screening effect is, according to Satoh,
"specific to fluorine rubber" (col. 7, line 27) and, insofar
as we are aware, not exhibited by fluorine-containing resins , 4
we find no motivation in Satoh for one of ordinary skill in
the art to make the fluorine-containing resin inner layer of
Igarashi ‘906 of the same thickness as the inner layer of
Satoh.
In the present case, the structure claimed by appellants
differs from that disclosed in the prior art in that
particular ranges of thicknesses and thickness ratios are
recited. In such a situation, appellants must show that the
claimed ranges
4Appellants represent on page 8 of their brief that "the
Igarashi [‘906] fuel hose which utilizes an inner fluorine
resin layer has no such chemical screen effects" (original
emphasis).
4
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