Appeal No. 1997-1498
Application No. 08/251,148
66).
Although Minnick generically describes polymer blends
having the claimed ingredients, it does not provide any
guidance of forming the claimed visually clear blend of
thermoplastic polymers. We agree with appellants that:
Minnick is silent as to visual clarity [regarding its
polymer compositions] and in fact, Minnick’s preferred
composition (100 mol% CHDM/100 mol% T) is cloudy.3
We also observe that Minnick does not recognize specific
proportions of 2, 6-naphthalene dicarboxylic acid in the acid
component of a polyester as a result effective variable for
forming a visually clear blend of thermoplastic polymers. See
Minnick in its entirety. On this record, we are constrained
to agree with appellants that Minnick would not have rendered
the claimed subject matter prima facie obvious to one of
ordinary skill in the art. Accordingly, we reverse the
3See Minnick in its entirety in conjunction with Table 1
on page 12 of the specification.
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