Appeal No. 1999-0404 Page 23
Application No. 08/580,256
in at least one of a condenser and an evaporator of a
refrigerating apparatus comprising a refrigerating cycle using
a refrigerant mixture flowing through the condenser and the
evaporator.
With regard to this difference, the examiner determined
(answer, p. 6) that it would have been obvious at the time the
invention was made to a person having ordinary skill in the
art to employ the heat transfer tube of Chiang in a
refrigerating apparatus comprising a refrigerating cycle using
a refrigerant mixture flowing through a condenser and an
evaporator as disclosed in the known prior art. We agree.
The arguments advanced by the appellants in their brief
and reply brief are unpersuasive for the reasons set forth
above with respect to claim 1 and the following reasons.
First, the combined teachings of the applied prior art
would have suggested the claimed invention to one of ordinary
skill in the art for the reason set forth above. We note that
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