Appeal No. 95-0368
Application No. 07/973,211
Appellants provide a reason to use the second towelette,
which is impregnated with sodium thiosulfate. See the following
description in the specification, paragraph bridging pages 2
and 3:
In a second embodiment of the present invention,
spills or leaks of HIV infected blood and/or anticancer
drugs on stainless steel or ceramic work surfaces
vulnerable to etching by the corrosive alkaline sodium
or calcium hypochlorite solutions are inactivated with
a two-step, towelette swabbing kit and process. A
first absorbent, fibrous (preferably cotton and/or
synthetic blend) towelette, impregnated with calcium
hypochlorite or, preferably, sodium hypo-chlorite, is
swabbed over the spilled HIV infected blood- or drug-
containing work surface to deactivate the spilled
compound. A second absorbent, fibrous (preferably
cotton and/or synthetic blend) towelette, impregnated
with sodium thiosulfate, is then swabbed over the
spilled HIV infected blood- or drug-containing work
surface to neutralize the alkaline calcium or sodium
hypochlorite residue from the first towelette, so as to
prevent the alkaline residue from corroding or etching
the work surface. [Emphasis added.]
Likewise, see the specification, paragraph bridging pages 6 and
7, explaining that the second towelette, impregnated with sodium
thiosulfate, is used
[T]o neutralize the alkaline calcium or sodium hypo-
chlorite residue from the first towelette, so as to
prevent the alkaline residue from corroding or etching
the work surface.
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Last modified: November 3, 2007