Appeal No. 94-2973
Application No. 07/956,529
Grouping of claims
According to appellant, the claims are grouped as follows
(Brief, p. 5):
(1) Claims 1-5, 7-15 and 19-21 stand or fall together;
(2) Claim 22 stands separately;
(3) Claims 16 and 20 stand or fall together; and
(4) Claims 17 and 18 stand or fall together.
Claim 1
Claim 1 is rejected under 35 U.S.C. § 102(b) as anticipated
by or, in the alternative, under 35 U.S.C. § 103 as obvious over
Shioji. We reverse this rejection.
Claim 1 recites a method of preparing an aqueous slurry of
magnesium hydroxide comprising forming an aqueous mixture of
specific amounts of (i) magnesium hydroxide, (ii) one or more
polymeric anionic dispersants and salts thereof, and (iii) one or
more specific water-soluble alkali metal salts. The mixture is
agitated to suspend the magnesium hydroxide.
Shioji discloses a method for producing an aqueous
dispersion of inorganic pigment, such as magnesium hydroxide, by
combining as a dispersant (I) at least one member selected from
the group consisting of (a) a carboxyl group-containing water-
soluble polymer and (b) a water-soluble condensed phosphate and
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