Appeal No. 1997-2917
Application No. 08/351,697
at 900EC. for four hours. These pores are microscopic in
nature, see Yi, pages 1175, column 2, and can be made more
uniform by using particular acids, see Yi, page 1176, column
1. Nakanishi also teaches that in the sol-gel method of the
type described in Yi and Kobayashi, a product of a sol-gel
method sintered at the temperature described in Yi and
Kobayashi can have micropores of substantially uniform
diameter. See column 1, lines 58-68 and column 3, lines 15-
17. Given these teachings, we determine that one of ordinary
skill in the art would have been led to obtain porous
superconductors having uniform pore sizes using the technique
taught in Yi, Kobayashi, and/or Nakanishi, motivated by a
desire to obtain a superconductor having consistent desired
properties along the entire length of Yi’s film.
Appellants also argue that the temperature recited in
claim 8 is not suggested by the applied prior art. We do not
agree. As indicated supra, Kobayashi teaches that a
temperature of
700E C. can be used to sinter the superconductor of the type
described in the Yi reference.
For the foregoing reasons, we hold that the applied prior
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