Appeal No. 1996-3799
Application No. 08/252,511
Initially, we note that appealed claims 1 and 12 recite a
“melt blend stabilizer composition” and “melt blending a
phosphorous compound and a hindered phenolic isocyanurate,”
respectively. Although the specification does not expressly
define the term “melt blend” or “melt blending,” one skilled
in the relevant art would understand from a reading of the
entire specification that the term “melt blend” refers to the
blending or mixing of the stabilizer components under
conditions such that at least one of these components is in
molten form. (Specification, page 2, lines 19-30; page 9,
lines 20-26; page 10, lines 30-33.)
We now consider the teachings of the applied prior art
references. Chaser describes stabilizer systems for organic
materials in which sterically hindered 4-substituted-2,6-di-t-
butylphenyl bis(substituted phenyl) phosphites are used in
combination with hydroxyphenylalkyleneyl isocyanurates.
(Column 1, lines 32-39.) Although Chaser teaches that “the
stabilizer mixture is added” to the organic material (column
5, lines 30-39), the only description relating to a
“stabilizer mixture” is a solution or a suspension of the
stabilizer compounds in a solvent, which is evaporated
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