Appeal No. 95-0112
Application 07/787,994
of the elements iron, nickel, cobalt and chromium: R is one or
more of the elements zirconium, tantalum, niobium, molybdenum,
tungsten, titanium, and vanadium; and X is one or more of the
elements boron, silicon and carbons,” does not reasonably 3
suggest an alloy which,(when heated between 300E-600E C), will
produce a superplastic steel comprising a mixture of ferrite
steel having a randomly oriented structure and a grain size no
greater than about 2Fm and at least one metal carbide having a
grain size no greater than about 0.5Fm as required by claim 1.
We find no reason based on the teachings of Giessen as to why one
of ordinary skill in the metallurgical art would have been
motivated to select an austenitic steel as required by claim 1,
and no reasons have been provided by the examiner.
Similarly, in our view, the temperature range of 600E to
1100E C disclosed by Giessen would have suggested to those of
ordinary skill in this art, the heating of the metal alloys at
temperatures greater than 600E C. That is, given the disclosed
range which produces metals having the desired characteristics of
high hardness, high tensile strength, good ductility and high
3Giessen, col. 2, lines 21-29.
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