Appeal No. 1996-3675
Application No. 08/259,933
of the salt bridge solution and would contaminate the high
purity water (column 1, line 54 to column 2, line 26).
Although Watanabe states that precipitates of insoluble AgCl
and Cl can clog the liquid junction and sufficiently high-
flow rate can wash away the precipitates, Watanabe proposes
the use of a pressure differential to prevent the flow of the
salt bridge solution in the inner tube to the outer tube
(column 2, lines 44-57).
By contrast, Monter discloses a high temperature hydrogen
reference electrode which is formed from a closed end tube of
palladium-silver alloy pressurized on the inside with pure
hydrogen gas (column 2, lines 18-23). Monter further teaches
that the alloy tube is loosely encased in a lightly perforated
sleeve which allows liquid such as water to be trapped between
the alloy tube and the sleeve where the water is saturated
with hydrogen permeating through the wall of the alloy tube
(column 2, lines 23-27). According to Monter, the high
temperature hydrogen reference electrode may be used in
measuring systems for determining the percentage of dissolved
oxygen in high temperature water on the secondary side of a
pressurized water reactor system in the approximate
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