Appeal No. 96-2341
Application 08/389,554
above
composition, from about 0.5 to about 20 wt% of a thickening
agent which can be colloidal alumina, from about 0.01 to about
10 wt% of a water soluble surfactant, from about 0.1 to about
3 wt% of corrosion inhibitors, from about 0.01 to about 10 wt%
of chelating agents, from about 0.01 to about 1 wt% of
stabilizers for the hydrogen peroxide, from about 0.1 to about
5 wt% of evaporation retardants, and not more than 25 wt% of
an acid as a coactivator (col. 2, line 54 - col 4, line 39).
Wilkins does not state that the disclosed composition is
shear thinnable.
Appellants argue that the fact that Wilkins’ composition
can be thickened such that it is viscous does not mean that it
is shear thinnable (brief, pages 10-11). In appellants’ view,
the teaching by Wilkins (col. 4, lines 39-41) that diluents
may be added to lower the viscosity of the composition
indicates that the composition is merely viscous and not shear
10
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