Appeal No. 96-0251
Application 07/874,697
submerged in an electrolyte (col. 2, lines 46-47 and 53-60).
When more than one reference cell is used, while a cell is
being rejuvenated by reversing the polarity between the
reference cell and the structure, one reference cell is always
connected to the millivoltmeter to provide continuous
monitoring (col. 7, lines 36-75; col. 8, lines 11-14).
Lucisano teaches that when the silver/silver chloride
reference electrode has partially dissolved and a layer of
silver has been formed on the working electrode, a
polarization treatment can be carried out to restore the
signal (page 739, left column, second full paragraph). The
teaching by Sabins of use of multiple reference electrodes
adapted to be connected sequentially to the circuit such that
a reference electrode always is in service while a reference
electrode is being rejuvenated by a polarization treatment
(col. 7, lines 36-75; col. 8, lines 11-14) would have fairly
suggested, to one of ordinary skill in the art, connecting
multiple reference electrodes in the Lucisano sensor such that
one is always in service during the disclosed polarization
treatment.
Appellants argue that there is no reason to believe that
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