Appeal No. 2000-0895
Application No. 08/754,797
replace the “straw supported cartridge” (col. 2, line 66) of
Magnusson with the filter tube 7 of Parker or the filter 22 of
Knight. Like the appellants, we view column 8, lines 42-46 of
Magnusson as stating simply that the straw-like cartridge 192
in Figure 6 could be substituted for the straw-like cartridge
238 in Figure 7. Both cartridges 192 and 238 are disclosed as
being mounted on a bottle cap usable with a water containment
means “which is pressurizable by way of a squeeze action
and/or a sucking action” (col. 6, lines 47-50). In other
words, a positive pressure alone, or in combination with a
sucking action, forces the water through the cartridge 192 and
238. Neither Parker nor Knight discloses a straw-like filter
structure or a filter mounted on a bottle cap. Rather Parker
and Knight disclose porous, tubular filter elements mounted in
the necks or openings of canteens or water bags, not on the
stopper 12 (Parker) or cover 26 (Knight). Further, neither of
the filter elements disclosed in Parker and Knight appears
capable of permitting the user to withdraw water from the
container through a sucking action. Instead, the containers
must be at least partially inverted, i.e., the water is poured
from the
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