Appeal No. 2001-2071
Application 09/285,921
A comparison of the appellants’ mixing sequence versus
blending (A) and (B) in the absence of (C) and then blending (C)
into the mixture of (A) and (B) is needed to determine whether
the appellants’ mixing sequence would have been unexpected by one
of ordinary skill in the art. The reason is that if mixing
(A) and (B) in the absence of (C) produces a mixture that is
difficult to handle and process due to its high viscosity, but
subsequently blending (C) with that mixture lowers the viscosity
to a suitable level, then it reasonably appears that one of
ordinary skill in the art would have expected that mixing (C)
simultaneously with (A) and (B) would produce a mixture having
the desired lower viscosity.
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