Appeal No. 95-0996
Application 07/943,025
(abstract, page 1, lines 1-14, page 2, lines 5-21, and page 3,
lines 29-32). EP ‘410 teaches that treating these catalysts
and the co-catalyst organoaluminum compound with
polymerization inhibitors such as carbon monoxide or carbon
dioxide renders the catalyst system “totally inactive for the
polymerisation of olefins” for a short period known as the
induction period (page 3, line 32-page 4, line 8). EP ‘410
defines a polymerization inhibiting agent as “any compound . .
. capable of slowing down or totally stopping the
polymerisation of the alpha-olefins in the presence of a
catalyst system of the Ziegler-Natta type” (page 12, lines 24-
31). Thus one of ordinary skill in the art would have
reasonably concluded from the teachings of EP ‘410 that
complete inactivation of the catalyst system for a time
period was contemplated. This conclusion is further4
reinforced by the teaching in EP ‘410 on page 13 regarding the
amounts of polymerization inhibiting agent that may be used,
including large amounts of the agent as long as the catalyst
is not poisoned.
As discussed by the examiner on page 3 of the main answer, the process4
of claim 1 is not limited to any specific time period subsequent to the
deactivation. The claimed term “with a long storage life” is not defined in
the claim or the specification (see page 8, lines 2-4).
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