Appeal No. 1999-1279
Application 08/802,294
(col. 1, lines 7-10; col. 2, lines 44-45). The examiner does
not explain, and it is not apparent, why the applied prior art
would have led one of ordinary skill in the art to include, as
a
component of St. Clair’s composition for making polyurethane
adhesives and sealants, a polymeric diol which Baack uses to
make solid or foam polyurethanes.
Nissen discloses flexible polyurethane elastomers for
making shoe soles that have low temperature flexibility (col.
2, lines 24-29). The disclosures in Nissen relied upon by the
examiner (answer, page 4) are that polyurethanes made using
linear polyesters have greater physical strength and lesser
susceptibility to the effects of light and oxidation than do
polyurethanes made using polyether polyols, and that polyester
polyols have a low glass transition temperature and thus good
stability when exposed to cold in the amorphous state in
polyurethane elastomers, but have an increased tendency to
crystallize which results in poorer low temperature
flexibility of those elastomers (col. 1, lines 45-61).
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