Appeal No. 2000-1269
Application 08/756,349
alternating substantially smooth and structured sheet-
metal layers defining channels therebetween through which a
fluid can flow;
all of said smooth sheet-metal layers being produced from
same initial materials as one another, all of said structured
sheet-metal layers being produced from same initial materials
as one another;
all of said smooth sheet-metal layers having a thickness
of from 0.04 mm to 0.06 mm, said structured sheet-metal layers
having a thickness of from 0.025 mm to 0.045 mm; and
all of said structured sheet-metal layers being at least
0.005 mm thinner than said smooth sheet-metal layers.
THE REFERENCE
Maus et al. (Maus) 5,102,743 Apr. 7,
1992
THE REJECTION
Claims 1-13 stand rejected under 35 U.S.C. § 103 as being
unpatentable over the appellant’s admitted prior art in view
of Maus.
OPINION
We reverse the aforementioned rejection.
Each of the appellant’s independent claims, i.e.,
claims 1, 12 and 13, requires that all of the smooth sheet-
metal layers are thicker than the structured sheet-metal
layers.
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