Appeal No. 95-0432
Application 08/002,448
matrices to which this invention may be applied. Included in
the long list of polymeric matrices are “polyester resins
including alkyd resins” (col. 7, l. 9). Godlewski states
(col. 7, l. 13-16):
Preferred polymers are the thermoplastic polymers, such
as
the polyolefins, e.g., polyethylene, polypropylene, and
the
like. The invention can be used in thermoset resins.
Considering Godlewski’s disclosure as a whole, including
the examples on pages 13-26, we find therein a marked
preference for polysiloxane-polyalkyleneoxyalkylenes as the
surfactant and evidence of their utility in polymeric matrices
limited to their utility in thermoplastic polymers. In the
invention Godlewski claims, the surfactants included need only
be useful “for improving the physical properties of
thermoplastic organic polymer filled with inorganic fillers”
(Godlewski’s Claims 1 and 7).
3. Weighing the evidence
The examiner concluded that persons having ordinary skill
in the art would have been led by Godlewski’s teaching to
replace the polysiloxane-polyalkyleneoxyalkylene surfactant
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