Appeal No. 1997-3142
Application No. 08/323,660
of overcoming all of the rejections under 35 U.S.C. § 112
(paper number 13). Accordingly, claims 1, 5, 6, 10 and 12
through 15 remain before us on appeal.
The disclosed invention relates to a method and apparatus
for substantially simultaneously determining amounts of CO ,
2
O , and N gases dissolved in a liquid sample.2 2
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. A method for substantially simultaneously determining
amounts of CO , O and N gases dissolved in a liquid sample,2 2 2
comprising the steps of:
(a) evacuating a sample cell, including a phosphorescent
material capable of being excited by primary light to emit
secondary light, via vacuum pressure;
(b) extracting a gas sample from the liquid sample, the
extracted gas sample then entering the evacuated sample cell;
(c) transmitting infrared (IR) radiation, at at least one
wavelength absorbed by CO gas, through the extracted gas
2
sample in the sample cell;
(d) transmitting primary light into the phosphorescent
material in the sample cell;
(e) measuring an amount of IR radiation absorbed as an
indication of the concentration of CO gas in the gas sample;
2
(f) measuring, substantially simultaneous to step (e),
an amount of secondary light emitted by the phosphorescent
material, quenched by O in the gas sample, as an indication
2
of the concentration of O gas in the gas sample, the
2
2
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