Appeal No. 98-2457
Application No. 08/851,312
the steps of: filling a metal pipe with material powder of a
superconducting compound oxide; subjecting the filled metal
pipe first to cold-plastic deformation and then to hot-plastic
deformation to reduce the cross section of the metal pipe;
sintering the material powder filled in the metal pipe; and
then
controlling the cooling of the resulting metal
pipe containing sintered ceramic material powder
to a rate of less than 50ºC/min.
Independent claim 40 is similar to claim 28, except that
it does not require a first cold-plastic deformation of the
filled metal pipe prior to hot-plastic deformation thereof,
but instead sets forth only hot-plastic deformation.
Independent claim 40 also sets forth materials for the metal
pipe and, more importantly, a dimensional reduction ratio
ranging from 16% to 92% under a heated condition, so that the
material powder filled in the metal pipe is sintered. Like
claim 28, claim 40 requires cooling of the resulting metal
pipe containing sintered ceramic material therein "slowly at a
rate of less than 50ºC/min."
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