Appeal No. 96-3486
Application No. 08/291,565
Table 1, page 23) on a catalyst prepared by applying an
atomized powder of inorganic oxide, cerium and iron
salts, to a substrate, show it is more effective in
converting carbon monoxide, nitrogen oxides, and
hydrocarbon pollutants of exhaust gases than, for
example, a catalyst prepared by first grinding these
materials or impregnating them into the support.
The Prior Art
Brunelle teaches the preparation of a catalyst
comprising a refractory oxide support, and an active
phase comprising cerium, iron, and at least one metal
selected
from platinum and palladium. Two alternative methods are
disclosed (column 4, lines 46-50):
1. impregnation of the support with a solution of
cerium and iron compounds, followed by
impregnation with a solution of precious metals,
or
2. “by introduction of the metals comprising the
active
phase during the actual production of the
support.”
The examiner states that “[a]pplicant is practicing the
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