Appeal No. 96-0797
Application No. 08/089,962
Lindermann Maschinenfabrik GMBH v. American Hoist & Derrick
Co., 730 F.2d 1452, 1462, 221 USPQ 481, 488 (Fed. Cir. 1984).
Here, the examiner relies on Jankura to show that the use
of on-line PH monitors to detect and monitor oxidation,
including a sulfite/bisulfite concentration, in a flue gas
desulfurization system. See Answer, pages 3 and 4. The
examiner then relies on the admitted prior art to establish
that an autotitrator and the use of a Modified Palmrose
analysis under laboratory conditions for detecting the
oxidation loss in a flue gas desulfurization system are known.
See Answer, page 4. The Modified Palmrose analysis is
summarized at pages 8 and 9 of the specification as follows:
1. Extract 2 ml of slurry sample using a 1 ml automatic
pipette and place in a 250 ml beaker. Add 25-50 ml
distilled H O.
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2. Add 5-10 ml starch solution.
3. Overtitrate with 0.125N H SO by at least 5 ml but
2 4
no more than 10 ml. Normally 15 ml of 0.125N
H SO will accomplish this.
2 4
4. Without agitating, titrate to a deep blue end
point with 0.125N KIO . (Begin to stir only after
3
about 50 percent of the KIO has been added.)
3
5. Add 1-3 drops of 3 percent sodium thiosulfate and
sample will become clear. If more than 3 drops
are required, the end point was exceeded;
start the entire test over.
6. Add several drops of methyl purple indicator.
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Last modified: November 3, 2007