Appeal No. 1996-3806
Application 08/183,152
Rejections over Sastri
Sastri discloses coatings which are characterized by a
microcrystalline, single-phase, solid solution structure with
metalloids dissolved therein (col. 2, lines 17-21). The
portion of Sastri relied upon by the examiner is Sastri’s
disclosure of prior art “hardfacing alloy coatings which are
characterized by their two-phase structures comprising (1) a
coarse grained (typically between 10 to 100 microns), face-
centered-cubic, cobalt-based, continuous phase and (2) a
randomly dispersed second phase of carbide, boride, etc.,
particles which are generally between about 1 to 10 microns in
size” (col. 5, lines 5-12).
The examiner argues that “Sastri discloses that the
claimed WC-Cr composite coatings on ceramics such as alumina
are known (column 5, lines 5-15)” (answer, page 2). The
portion of Sastri relied upon by the examiner, however, does
not mention WC or
alumina. Appellant argues that the prior art crystalline
cobalt referred to by Sastri is not a binder (brief, page 10).
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