Appeal No. 2005-1538
Application No. 09/950,654
of such places. Seltzer teaches that the precise location where
the stabilizer additive should be added will depend on the
specific equipment involved, the exact process conditions being
used and the like. In some cases, the additives may be added at
one or more locations for most effectiveness.
Hence, Selter is not limited to applying the nitroxides as
coatings, as appellant asserts.
The examiner also correctly points out that, on page 96 of
Seltzer, Seltzer teaches that a hindered amine can be used, and
that the hindered amine can be a hindered amine TEMPO. See
Examples I and J on page 96 of Seltzer. Answer, page 3.
The examiner relies upon Jewell for using tetra-methyl
hindered amine to prevent the color reversion in paper pulp, and
refers to column 4, lines 21-23 of Jewell. The examiner also
refers to Table 16 in column 24 of Jewell in this regard.
Answer, page 3.
The examiner concludes that it would have been obvious to
have substituted the particular hindered amine of Jewell
including the 4-amino TEMPO found in Table 16, for the hindered
amine of Seltzer, for performing the same function of
stabilizing the pulp from light and preventing color reversion.
Answer, page 3.
Appellant argues that Jewell is not directed to materials
which contain lignin. That is, appellants argue that the
cellulose fibers treated in Jewell are not lignocellulosic
materials. Appellant argues that the cellulose pulp of Jewell
is described as generally having about 86-88% α-cellulose and
12-14% hemicellulose, and refers to column 4, lines 16 and 17 of
Jewell in this regard. Brief, pages 5-6. Appellant also argues
that the nitroxide used in Jewell is not chemically attached to
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