Appeal No. 1999-0404 Page 22
Application No. 08/580,256
Claim 9 reads as follows:
In a refrigerating apparatus comprising a
refrigerating cycle using a refrigerant mixture flowing
through a condenser and an evaporator, the improvement
comprising at least one of said condenser and evaporator
including a heat transfer pipe having an inner surface
comprising main grooves and auxiliary grooves
intersecting with said main grooves, wherein said main
grooves are separated by ridges, and said ridges are
divided into ribs by said auxiliary grooves, and wherein
a length of said ribs formed along the direction of said
main grooves is made longer than a width of said ridges,
a width of said auxiliary grooves is made smaller than
the length of said ribs and further said auxiliary
grooves are formed in a direction where a pressure
gradient in said heat transfer pipe is reduced.
In addition to the teachings of Chiang set forth above
with respect to claim 1, the examiner relies of the Jepson
format of claim 9 as admitting that a refrigerating apparatus
comprising a refrigerating cycle using a refrigerant mixture
flowing through a condenser and an evaporator is known prior
art.
Based on our analysis and review of Chiang and claim 9,
it is our opinion that the only difference between Chiang and
claim 9 is the limitation that the heat transfer pipe is used
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