Appeal No. 94-1325
Application No. 07/882,928
directing the intense beam of energy
towards the cracks in the metal;
vaporising [sic] metal within the rail or
wheel in the vicinity of the cracks to
form a vapour space extending at least 5
mm into the rail or wheel;
moving the beam of energy along the rail
or wheel at a speed such that the metal
surrounding the cracks melts when the beam
of energy is directed towards the metal
and solidifies after the intense beam of
energy moves on to form a narrow strip of
melted and solidified metal; and
depositing an alloying material within the
vapour space to form a microstructure upon
solidification of the alloying material
that is compatible with the rail metal.
As evidence of obviousness, the examiner has relied upon
the references listed below:
Gnanamuthu et al. 4,015,100 Mar. 29,
1977
(Gnanamuthu)
Shupe 4,201,602 May 6,
1970
The following rejection is before us for review.
Claims 5 through 7, and 11 stand rejected under 35
U.S.C. § 103 as being unpatentable over Gnanamuthu in view of
Shupe.
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