Appeal No. 2002-1284 2
Application No. 09/098,730
to the final rejection which are all the claims pending in this application.
THE INVENTION
The invention is directed to a multilayered air fuel sensor having a plurality of
substrate layers, at least one solid electrolyte layer and at least one insulating layer. The
boundary layer has an average sintered particle size larger than both the solid electrolyte
layer and the insulating layer. Additional limitations are described in the following
illustrative claim.
THE CLAIM
Claim 1 is illustrative of appellants’ invention and is reproduced below.
1. A multilayered air-fuel ratio sensor having a plurality of stacked layers
comprising:
a plurality of substrate layers comprising at least one solid electrolytic substrate layer
and at least one insulating substrate layer; and
a boundary layer interposed between said solid electrolytic substrate layer and said
insulating substrate layer;
wherein said boundary layer has an average sintered particle size that is larger than
that of said solid electrolytic substrate layer and that is larger than that of said insulating
substrate layer.
THE REFERENCES OF RECORD
As evidence of obviousness, the examiner relies upon the following references:
Suzuki et al. (Suzuki) 4,177,112 Dec. 4, 1979
Mase et al. (Mase) 4,861,456 Aug. 29, 1989
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