Appeal No. 2000-0081
Application No. 08/785,099
joining members mounted to respective ends of said
first and second insulating walls so that said
joining members and first and second insulating
walls define a hermetically sealed insulated cavity.
The examiner takes the position that (answer, page 4):
The patent of Stahl et al., in Figure 4 and in the
Abstract, discloses a second insulating wall (10)
located around a first insulating wall (20) of a
fluid channel, welding the first and second
insulating walls (10, 20) together and evacuating
the cavity between the two insulationg walls (10,
20) [for] the purpose of insulating the second
insulating wall from the heat transfer fluid flowing
through the fluid channel. It would have been
obvious at the time the invention was made to a
person having ordinary skill in the art to employ in
Fleissner (‘666) welding the first and second
insulating walls together and evacuating the cavity
between the two insulating walls for the purpose of
insulating the second insulating wall from a heat
transfer fluid flowing through a channel as
disclosed in Stahl et al.
On page 10 of the brief, appellant first argues that the
two fields of technology to which the Fleissner and Stahl
devices relate (Fleissner: textiles; Stahl: piping) are so
diverse that there would be no reason for one of ordinary
skill to combine their teachings absent an improper hindsight
reconstruction based on appellant’s disclosure. To the extent
that this constitutes an argument that Stahl is nonanalogous
art, we disagree. As stated in In re Clay, 966 F.2d 656, 658-
3
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