Appeal No. 2000-0812 Page 8
Application No. 08/989,469
sensitive material (col. 1, lines 54-66). Vrancken further
teaches various ranges for particle sizes that would result in
improved resolution, among which polymer particles not larger
than 0.1 Fm [100 nm] are identified to produce particularly
good results (col. 8, lines
2-8).
Coppens, on the other hand, is related to a method of
making lithographic printing plates that include a substrate,
an intermediate layer comprising hydrophobic polymer beads
having an average diameter not lower than 0.2 Fm [200 nm] and
a silver halide emulsion layer (abstract & col. 12, lines 58-
62). We further find that Coppens teaches that the average
size of the silver halide grains may range from 0.2 to 1.2 Fm
[200-1200 nm] where the grain size distribution can be
homodisperse or
heterodisperse (col. 16, lines 37-42). Although we
acknowledge that Coppens refers to the benefits of uniform
silver halide grains resulting in development of crisper and
more uniform images, we do not find any teachings related to
similar preference or benefits related to homodispersity of
the hydrophobic polymer beads.
Based on the findings above, we cannot agree with the
examiner that the homodispersity of silver halide grains of
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