Appeal No. 97-2554
Application No. 08/164,112
Span 80, and Tergitol 15-S-5. Surfactants named as “proven to
be unsuitable for use in the present invention in that they
are not able to reduce the odor of urine as determined by the
Surface-Active Agent Effectiveness Test” are Lexemul 530,
Igepal CO-210 and CO-430, and Unithox 450.
On pages 12 and 13, appellant discloses his Surface-
Active Agent Effectiveness Test. A solution in ethanol of the
surface-active agent to be tested is sprayed on absorbent
material; then (page 12, line 33 to page 13, line 3):
1.5 grams of the coated, particulate water-
swellable, generally water-insoluble absorbent
material is placed in a watch glass. Four drops
(about 0.2 milliliters) of reconstituted urine
(UriChem®) is applied to the coated absorbent
material. 1.5 grams of the particulate, water-
swellable, generally water-insoluble, hydrogel-
forming polymeric absorbent material having no
surface-active agent coated thereon is placed in a
watch glass and serves as a control sample. Four
drops of reconstituted urine (UriChem®) is applied
to the absorbent material (control). The two
samples are then subjected to the Odor Perception
Test described above.
The Odor Perception Test is described as follows (page 12,
lines 6 to 12):
Odor perception is, by its nature, a very subjective
determination. According to the procedure, a small
group of up to four samples are [sic] reviewed at
one time. The samples to be tested are provided to
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