Appeal No. 95-4838
Application No. 08/131,643
from venting out to the atmosphere.” See Answer, page 4.
Moreover appellants’ statement in their specification that,
“(G)overnments worldwide are taking a more aggressive role in
legislating and regulating the amount of air pollution that
factories may generate in the United States, at least, each
year seems to bring new and more restrictive government air
pollution standards,” provides in and of itself ample
motivation to improve on traditional industrial practices and
add on additional particle removing devices such as those of
Yeh or Kito to reduce the amount of air pollution and thereby
purify the air.
This goal is further recognized by both Yeh and Kito.
Yeh discloses an apparatus for separating finely divided
particles down to molecular size species by using
electrostatic separating forces. See Yeh, column 2, lines 9-
41. Moreover, Yeh expressly discloses that his invention may
be used for, “removal of particulate matter from a high
velocity fluid stream at high temperatures and pressures with
negligible pressure drop.” See Column 4, lines 25-27.
Similarly, Kito provides for the purification of waste gas by
an electrostatic precipitator prior to being released to the
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