Appeal No. 2002-0972
Application 08/816,466
Nowlin discloses a method for forming a supported catalyst
system by contacting a solid, particulate porous carrier, which
preferably is inorganic and most preferably is silica, with a
solution comprising methylalumoxane (the appellant’s activator)
and preferably also comprising a metallocene (col. 3, lines 12-13
and 26-29; col. 6, lines 50-51; col. 7, line 7; col. 8, lines 14-
16). Nowlin does not disclose the appellant’s depressurizing and
pressurizing steps.
Uvarov discloses a supported catalyst system consisting of
1) a catalyst which is a compound of a transition metal of
groups IV-V, preferably titanium or vanadium, advantageously in
the form of chlorides thereof, deposited onto a polymeric carrier
comprising a macroporous copolymer of vinyl and divinyl monomers
having a specific surface area of 30 to 700 m2/g, and 2) an
organoaluminum co-catalyst (col. 1, lines 57-65; col. 2,
lines 40-42).1
1 Uvarov defines “macroporous copolymer” as “a two-phase system, therein
the polymeric compound is pierced with communicating cavities (pores) capable
of being filled with an external medium upon submersion thereinto” (col. 1,
line 66 - col. 2, line 2).
3
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