Appeal No. 96-3486
Application No. 08/291,565
As seen in claims 1 and 27, a porous layer of at
least four substances: a refractory inorganic oxide, an
iron oxide; a cerium oxide; and a catalytically active
metal such as platinum, rhodium, or palladium, is
deposited on a ceramic or metal substrate to produce a
catalyst. The refractory inorganic oxide, according to
the supporting specification (sentence bridging pages 1
and 2), serves as a carrier for the catalytically active
phase on the substrate and is selected from a group
limited to certain crystalline aluminas, zeolite, silica-
magnesia, titanium or zirconium
oxides, or mixtures thereof. The cerium and iron oxides
(page 2, lines 5-19) act to stabilize the catalyst during
operation. To this extent, the claimed methods cover
conventional subject matter.2 The inventive feature
resides, more particularly, in the manner by which these
substances are combined.
The supporting specification states that a “new
technique has now been discovered for introducing such
oxides, particularly iron and cerium oxides, into the
2 See claim 1 of Brunelle, cited in both the supporting
specification (page 2, line 16) and the final rejection.
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