Appeal No. 1999-2158
Application No. 08/971,460
the Advisory
Action dated Oct. 2, 1998, Paper No. 16). Claims 1, 2 and 5 1
through 11 are the only claims remaining in this application.
According to appellants, the invention is directed to a
process of forming a silica sol comprising the steps of
forming an initial mixture of silica particles in water and
subjecting the mixture to shear-mixing, wherein the
improvement comprises adding an alkaline material containing
no metal cation to the initial mixture to produce a pH range
of 6 to 9 (Brief, page 3). A copy of illustrative claim 1 is
reproduced below:
1. Process comprising forming a silica sol of
substantially unagglomerated silica, the process
comprising the steps of forming an initial mixture of
silica particles in water and subjecting the mixture to
shear-mixing, thereby forming the silica sol,
WHEREIN THE IMPROVEMENT COMPRISES
including an agent in the initial mixture so that
the pH is a value in the range of pH6 to pH9, in which
1Although the examiner states that the amendment dated
Sep. 22, 1998, will be entered upon filing of an appeal
(Advisory Action, Paper No. 16) and that the amendment of Sep.
22, 1998, “has been entered” (Answer, page 2), this amendment
has not been physically entered into the record. Upon return
of this application to the jurisdiction of the examiner, this
error should be rectified. We have considered the claims as
if the amendment of Sep. 22, 1998, had been physically
entered.
2
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