Appeal 2007-2774
Application 10/285,632
"in order to reduce the load of particulates accumulating at the various
filters employed in Mahoney" (Answer at 6, ¶ 2).
[31] Appellant does not contest the Examiner's above findings (FFs 24-26)
or conclusion (FF 27).
[32] The Examiner further found that Mahoney taught that large quantities
of excess paint may be captured by recirculating wash water in
applications concerning automotive vehicles at column 1, lines 16-22
and 32-35 (Answer at 7, ¶ 1).
[33] The Examiner still further found that Mizuno taught that the
concentration of melamine-aldehyde acid colloid in the circulating
flush water is roughly 1 to 5,000 ppm and that the weight ratio of
colloid to paint ranges from 0.1% to 300% (Answer at 7, ¶ 2).
[34] The Examiner "extrapolated" Mizuno's teachings (FF 33) to obtain a
paint concentration of approximately 1% to 50% by volume and
pointed to column 6, lines 29-32, of Mizuno in support of his
"extrapolation" (Answer at 7, ¶ 2).
[35] Column 6, lines 29-32, of Mizuno reads "A paint solution was
prepared by dissolving an acrylic type resin paint in a solvent
(composed of toluene, acetone, methyl acetate, and methanol in a
volume ratio of 10:30:30:30)."
[36] The Examiner concluded that one of ordinary skill in the art would
have recognized that used flush solution "may contain large quantities
(5-20% by volume) of paint, since Mahoney and Mizuno teach that it
is well known to treat recirculating spray paint booth water with large
quantities of paint by flocculants and coagulants to agglomerate and
detackify" (Answer at 8, ¶ 1).
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