Appeal No. 96-2307
Application No. 08/293,630
blended span gas for obtaining simultaneous readings of the
multiple analyzers for calibration or diagnostic purposes.
Claim 6 is illustrative of the claimed invention, and it
reads as follows:
6. In a method for calibrating or diagnosing multiple
engine exhaust gas analyzers responsive to HC, NOx, CO and CO2
constituent gases, the steps of:
providing a blended span gas comprising a known mixture of a
zero gas with said constituent gases; and
simultaneously supplying to all of said analyzers at least
one sample comprising a selected division of said blended span
gas for obtaining simultaneous readings of the multiple analyzers
for calibration or diagnostic purposes.
The references relied on by the examiner are:
Rankine et al. (Rankine) 3,854,876 Dec. 17, 1974
Barcellona et al. (Barcellona) 4,498,496 Feb. 12, 1985
Kimura et al. (Kimura) 5,333,487 Aug. 2, 1994
Claims 1 through 10 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Kimura in view of Rankine and Barcellona.
Reference is made to the briefs and the answers for the
respective positions of the appellant and the examiner.
OPINION
We have carefully considered the entire record before us,
and we will reverse the obviousness rejection of claims 1
through 10.
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