Appeal No. 1999-2153
Application No. 08/958,848
or suggestion of formulating a thermally conductive paste with a
polyester self-condensation reaction product having an acid no.
of any kind much less an acid no. of about 45-85 as here claimed.
We understand the examiner’s point that Iruvanti teaches
formulating his thermally conductive paste with a stabilizing
dispersant which constitutes a polyester as disclosed in
Stansfield and that Stansfield discloses polyesters generally
including “preferred polyesters having acid values in the range
of 10 to 100 mgms. KOH/gm. and especially in the range of 20 to
50 mgms. KOH/gm.” (column 2, lines 52-55). Nevertheless, we do
not share the examiner’s apparent belief that these disclosures
of Iruvanti and Stansfield would have suggested formulating
Iruvanti’s thermally conductive paste with a polyester self-
condensation reaction product having an acid no. value of about
45-85 as claimed by the appellants.
This is because, as again properly argued by the appellants,
the polyesters of Stansfield are used to prepare dispersions of
inorganic pigments in the manufacture of inks and paints (e.g.,
see the abstract). Thus, while patentee teaches formulating his
dispersions with preferred polyesters having acid no. values
which are inside as well as outside the here claimed range, there
is simply no suggestion in either Stansfield or Iruvanti of
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