Appeal No. 2006-0916
Application No. 10/345,711
components may also be pressed, cast or injected into
cold or heated molds, which may be relief molds or
solid or hollow molds, and left to harden in these
molds at room temperature or temperatures up to 200°C,
optionally under pressure, optionally employing a
centrifugal casting method. (Underscoring added;
column 14, lines 37-64.)
In an example, Markusch describes a foamed composite made
by a process in which 100 g of a polyisocyanate and 50 g of a
polyol are stirred together for about 1 minute, and then 100 g
of “finest wood chips” (water content 8% by weight) are mixed in
for 1 minute. (Example 56.) According to Markusch, “[t]he
foaming process set in immediately after the components had been
mixed and was completed 5 minutes later at room temperature.”
(Column 27, lines 54-57.)
Claim 20
Markusch’s process as described in Example 56 differs from
the invention recited in appealed claim 20 only in that the wood
particles are mixed into the reaction mixture last instead of
the polyisocyanate. As noted above, however, Markusch teaches
that the reaction may be facilitated “by mixing the above
described components either in one stage or in several stages in
an intermittently or continuously operating mixing apparatus”
and places no limitation on the order of addition of the
components. (Column 14, lines 37-43.) Furthermore, in
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