Appeal 2007-1174
Application 11/001244
(1) Nishino teaches that polymer thickeners were known to be
blended with cyanoacrylate adhesives in order to increase
the viscosity, and ultrafine anhydrous silica was blended
with cyanoacrylate adhesives in order to give high
thixotropy and improve flowability and penetration (col. 1,
ll. 20-23 and 31-34);
(2) Nishino discloses that prior art adhesive compositions
included cyanoacrylate, poly(methylmethacrylate) (PMM)
as a thickener, a quick-curing additive, and fumed silica
(col. 1, ll. 44-50, citing US 4,845,151);
(3) Nishino discloses an adhesive composition comprising a
cyanoacrylate, a specific amount of PMM with an average
molecular weight of from 100,000 to 300,000, a specific
amount of a quick-curing agent represented by formula (1),
and an ultrafine anhydrous silica (col. 3, l. 38-col. 4, l. 29;
Answer 3-4);
(4) Nishino teaches that “[o]ne or more of other known various
thickeners which are used in combination with the
cyanoacrylate may be used” (col. 4, ll. 44-49);
(5) Nishino teaches that various difficulties are encountered
when thickeners are used which do not meet the
requirements of the invention with respect to the weight
average molecular weight and the amount (col. 3, ll. 26-30);
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