Appeal No. 2000-1448 7
Application No. 08/709,975
Mülhaupt is directed to a process for the preparation of olefin polymers stable to
heat and oxidation by the addition of a plurality of stabilizers to the polymerization. See
column 1, lines 5-8. We find that the plurality of stabilizers includes a 2,2, 6,6-
tetramethylpiperidine and a phosphorous III ester. See column 2, lines 40 -60. The
piperidine stabilizers may have molecular weight in excess of 700 and accordingly read on
the requisite molecular weight of greater than 1000. See column 2, lines 62-65. We find
that the piperidine stabilizers include oligomeric or polymeric compounds having molecular
weights in excess of 1000 wherein m is a number of from 2 to about 200. See column
15, lines 55 to column 16, line 59. We find that of the particular suitable compounds,
those numbered 74, 76, 84, 87, and 92 may have molecular weight in excess of 1000.
See column 21, lines 14-15 and the specific compounds referred to therein. We find that
the piperidine derivatives exemplified by H-1 have a molecular weight in excess of 1000.
We find that AO-1 and AO-3 are each phenolic antioxidants falling within the scope of the
claimed subject matter. See column 25, lines 15-20. We further find that the
phosphorous compounds P-2 correspond to Ph-3 of the claimed subject matter. We
further find that Example 6 of Mülhaupt disclose each of the preferred antioxidants in
proportions which fall within the scope of the claimed subject matter. Mülhaupt lacks only
a disclosure or suggestion that the composition may be placed in permanent contact with
water.
Spivack however, likewise directed to the stabilization of polyolefins, states that, “[a]
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