Appeal No. 95-2237
Application 08/067,308
Also, the claimed porcess requires that the starting
medium is a colloidal silica sol containing at least 2% by
weight of SiO . However, the starting material of Weldes is
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an alkaline solution that "may contain no silica at all or
merely that which results from using an alkali silicate
solution diluted to the desired pH." (col. 2, lines 21-23).
Hence, although the starting material of Weldes may apparently
contain some incidental silica, the examiner has not
established that it would have been obvious
from the teaching of Weldes to employ a starting material that
is a silica sol having the claimed SiO content of 2-20% by
2
weight. In particular, the examiner has not made out the case
that by following the teachings of Weldes for forming a
starting material, the claimed starting material containing a
silica sol solution having the recited amount of SiO would2
necessarily, or inherently, result.
In conclusion, based on the foregoing, the examiner's
decision rejecting the appealed claim is reversed.
REVERSED
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