Appeal No. 2003-0907
Application No. 09/337,278
circumference of the roll brush. Miyashita further acknowledges that clogging of
the roll brush results in counter contamination in subsequent cleaning. (Col. 1, ll.
56-60). One of the devices described by Miyashita employs sponge brushes that do
not come into contact with the upper and lower surfaces of the device and a third
brush that abuts the side portion of the device for cleaning. (Col. 2, ll. 11-38). The
cleaning method of Miyashita uses sponge-like brushes and water having resistivity
of about 5 MScm in the cleaning method. (Col. 3, ll. 36-43; col. 4, ll. 1-9; and col.
5, l. 60 to col. 6, l. 7).
The Examiner relies on Kanno to exhibit that persons of ordinary skill in the
art recognize that the use of large amounts of water on the surface, of the device to
be cleaned, would generate a static charge and this charge could be reduced by
lowering the resistivity of cleaning water by the inclusion of CO2 gas. (Answer,
p. 5). Kanno specifically discloses “the resistivity of pure water may be lowered by
mixing a gas, such as CO2 or a surfactant with pure water in consideration of
electrical damage (static charge) applied to a device.” (Col. 5, ll. 37-40).
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