Appeal No. 96-2307
Application No. 08/293,630
We agree with the examiner (Answer, page 3) that “Kimura
et al. teach (col. 1, lines 11-24) use of individual
(constituent) gas sensors coupled to an engine exhaust line, but2
not calibration.” We also agree with the examiner (Answer, pages
3 and 4) that “Barcellona et al. teach (Abstract; Figs. 1, 3-6)
mixing zero gas T with a second gas source T to provide az s
plurality of different proportions of calibration gases in a
‘sequential’ (Abstract, line 4 from last) manner to calibrate
‘analyzers for exhaust gases from internal combustion engines’
(col. 1, lines 8-9).” Figure 1 of Barcellona more specifically
illustrates an apparatus wherein a zero gas provided to connector
11 and a span gas provided to connector 12 are mixed in varying
amounts in mixing chamber 50 after passing through capillary
tubes 40. Valves 31 control how much of each gas passes through
the capillary tubes 40. Outlet 61 is to an analyzer of exhaust
gases from an internal combustion engine (column 4, lines 14
through 17). Barcellona indicates (column 4, lines 47 through
50) that the Figure 1 apparatus is used for calibration of an
exhaust gas analyzer. The constituent gases of the exhaust gases
2The admitted prior art in Figures 3A and 3B teaches “use
of individual (constituent) gas sensors [14, 12, 42, 44 and 20]
coupled to an engine exhaust line,” and calibration.
3
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