Appeal No. 95-3845
Application 08/132,736
Tsutsui discloses an olefin polymerization catalyst
comprising a solid titanium catalyst component containing
titanium, magnesium and halogen as its essential components,
which supports 1) a transition metal compound containing a
ligand having a cycloalkadienyl skeleton and, if necessary, 2)
an organoaluminum oxy-compound (col. 3, lines 1-8). The
organoaluminum oxy-compound may be a known aluminoxane or a
benzene-insoluble organoaluminum oxy-compound which the
patentees state that they discovered (col. 8, lines 27-31).
The disclosed known aluminoxanes include dialkylaluminum
aryloxides (col. 8, line 55 - col. 9, line 3). The benzene-
insoluble organoaluminum oxy-compounds, the disclosure of
which is relied upon by the examiner in his rejection (answer,
page 3), include compounds having units which have an aryloxy
group with 6 to 20 carbon atoms (col. 10, line 51 - col. 11,
line 2). The units having an aryloxy group can be the
predominant component of the organoaluminum oxy-compound (col.
11, lines 2-11). Tsutsui does not disclose that the aryloxy
group can be substituted, let alone be substituted with an
electron withdrawing group.
The examiner argues (answer, pages 4-5) that
3-3-
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