Appeal No. 2001-2048
Application 09/357,257
2) bis(2,4-dicumylphenyl)pentaerythritol diphosphite,
3) triisopropanolamine, 4) a hydrotalcite, and 5) at least one
phenol.
The examiner has not pointed out where the applied
references disclose or would have fairly suggested, to one of
ordinary skill in the art, using bis(2,4-dicumylphenyl)-
pentaerythritol diphosphite in combination with triisopropanol-
amine to make a polyolefin composition. Stevenson discloses
using trialkanolamine in the preparation of bis(2,4-dicumyl-
phenyl)pentaerythritol diphosphite to increase the yield of that
diphosphite (col. 15, lines 17-20), but does not indicate that
any of the trialkanolamine is present in the diphosphite used to
make Stevenson’s polyolefin composition.
The examiner points out that the appellants disclose in
their specification (page 16, lines 2-9) that bis(2,4-
dicumylphenyl)pentaerythritol diphosphite was commercially
available as Doverphos® S-9228T, and that a blend of this
diphosphite and triisopropanolamine was commercially available as
Doverphos® S-9228T (answer, page 6). The examiner argues that
the fact that bis(2,4-dicumylphenyl)pentaerythritol diphosphite
and triisopropanolamine are sold as a blend indicates that they
are to be used together and that one of ordinary skill in the art
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