Appeal No. 1997-3142
Application No. 08/323,660
“extracting the gas sample from the liquid sample, measuring
the CO concentration directly (which may be done by measuring
2
IR absorption), measuring the O concentration directly,
2
measuring the total pressure of the sample, [and] measuring
the temperature of the sample.” We agree with the examiner
(Answer, page 4) that “[w]hat Seiden et al. lacks is the steps
(and corresponding means) of measuring the O concentration by
2
measuring the quenching of the light emitted by a
phosphorescent material (ie. employing a sample cell
containing a phosphorescent material, transmitting primary
light into the material, and measuring the amount of secondary
light emitted by the material as indicative of the
concentration of O ), measuring the CO concentration by IR2 2
absorption in which the transmitted light is at a wavelength
of 2.7 microns, and having the IR radiation and emitted light
orthogonal to each other.”
The examiner turns to Billetdeaux for a teaching of
measuring CO by infrared absorption. Billetdeaux discloses
2
an “infrared absorption band of CO that has a central
2
wavelength of around 2.72 microns” (column 2, lines 2 through
4). In Billetdeaux (Figure 3), infrared radiation from
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