Appeal No. 95-2245
Application No. 08,011,563
Quemere's process because the Quemere reference
requires no specific source from which to obtain the
titanium dioxide and a skilled artisan would be
motivated by economics to depart from the prior art
to reduce costs consistent with the desired product
properties, In re Clinton 188 USPQ 365, In re
Thompson 192 USPQ 275.
It appears to be the examiner’s conclusion that it would have
been obvious to employ by-product sintered titanium dioxide
from an admittedly known chloride process as a catalyst for
promoting hydrolysis of carbonyl sulfide. However, the
examiner’s conclusion is not supported by evidence. We find
that the examiner does not refer to any evidence which
indicates that the existence of sintered titanium dioxide as a
by-product in a chloride process was known to those skilled in
the art at the time the application was filed. We also find
that the examiner has not demonstrated that sintered titanium
dioxide was known to be useful as a catalyst for the
hydrolysis of carbonyl sulfide at the time the application was
filed. Without such knowledge, we cannot find any motivation
or suggestion to employ the sintered titanium dioxide by-
product from a chloride process for hydrolyzing carbonyl
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