Appeal No. 96-0216
Application 07/842,915
pending, but have been withdrawn from consideration by the
examiner in accordance with 37 CFR § 1.142(b).
Claims 1 and 9 are illustrative of the subject matter on
appeal and read as follows:
1. A method of producing a clear soluble silicate solution
free of unreacted silica from biogenetic silica containing metal
salts and organic material which could leach into and contaminate
and color the soluble silicate solution comprising,
dissolving in a closed container the biogenetic
silica in an alkali solution of at least pH 12 in an
amount effective to dissolve all of the biogenetic
silica and at a temperature not higher than 275EF in
the presence of a solid carbonaceous material thereby
preventing the metal salts and organic material from
leaching into and coloring the resulting soluble
silicate solution,
removing the resulting soluble silicate solution
from the closed container, and
separating the solid carbonaceous material, the
metal salts and organic material from the resulting
soluble silicate solution.
9. The method of claim 1 including, frothing the separated
resulting soluble silicate solution to form a foam.
The references relied on by the examiner are:
Blardone 1,293,008 Feb. 04, 1919
Nakagawa 39-27314 Nov. 30, 1964
(Japanese patent publication)
Mallow et al. (Mallow) 3,856,539 Dec. 24, 1974
Claims 1, 3 through 10 and 12 through 18 stand rejected
under 35 U.S.C. § 103 as being unpatentable over Nakagawa in view
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