Appeal No. 1997-3094
Application 08/405,279
as aluminum nitrate, aluminum chloride, aluminum oxychloride
or aluminum acetate (col. 9, lines 5-11). Wan states that
after the impregnated ceria is dried in air, the aluminum
probably is present in a compound, presumably alumina (col. 9,
lines 11-22).
Appellants’ specification states (page 7, lines 20-26)
that “[r]eference herein or in the claims to ceria, any of the
second metal oxides, or alumina as being in ‘bulk’ form means
that the ceria, second metal oxides or alumina are present as
discrete particles (which may be, and usually are, of very
small size, e.g., 10 to 20 microns in diameter or even
smaller) as opposed to having been dispersed from solution
into particles of another component.” Thus, the alumina
stabilizer on Wan’s ceria particles is not a bulk second metal
oxide as required by appellants’ claim 25.
Wan discloses that the catalyst composition can contain
alumina particles as a support for a platinum group metal
catalytic component (col. 10, lines 36-39). Because the
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