Appeal No. 1997-3142
Application No. 08/323,660
infrared source 1 is directed through sample chamber 2 with
CO therein (column 3, lines 66 through 75). A detector 6 at
2
the other end of the sample chamber detects CO wavelengths
2
(column 4, lines 3 through 26).
The examiner then turns to Stanley for a teaching of
measuring O based on quenching of fluorescent emissions from
2
a sensor film 15, 25 and 37 (Figures 1, 2 and 9,
respectively). In the Figure 1 embodiment, light from source
20 passes through glass tube 14 and excites the fluorescent
material 15. Fluorescent radiation emitted by the film 15 is
detected by detector 21 (column 5, lines 53 through 55). The
detector measures “the extent of fluorescent quenching due to
oxygen” in the tube 14 (column 5, lines 59 through 66). In
the Figure 2 embodiment, light from source 27 strikes the
sensor film 25 at an angle, and the fluorescence therefrom is
reflected to detector 28 (column 6, lines 55 through 68).
The examiner indicates (Answer, page 5) that it would
have been obvious to one of ordinary skill in the art to
employ the sensors of Stanley and Billetdeaux with the method
of Seiden because “the sensors of Stanley et al. and
Billetdeaux et al. would provide accurate and advantageous
6
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