Appeal 2007-0128
Reexamination Control 90/006,208
Patent 5,573,648
in an ambient atmosphere comprising:
a porous mixed ionic-electronic conductive sensing electrode
having both an electronic conducting material and an ionic conducting
material;
a porous mixed ionic-electronic conductive counter electrode
having both an electronic conducting material and an ionic conducting
material;
a first protonic conductive electrolyte membrane in between
and
in contact with the sensing and counter electrodes, and having a
thickness in the range of approximately 0.1 mm to 1 mm;
the sensing electrode reacting with the gas to produce a change
in an electrical characteristic between the sensing electrode and the
counter electrode;
means for electrical measurement;
said sensing and counter electrodes each having a diameter in
the range of approximately 1 mm to 15 mm, and being electrically
connected to said electrical measurement means;
whereby, in a positive ambient concentration of said gas, said
electrical measurement means detects changes in said electrical
characteristic.
4) Atwood=s specification describes a “means for electrical
measurement” as a voltage meter that measures potential differences
between electrical leads. (>648 patent specification under reexamination,
col. 6, ll. 8-10 and col. 8, ll. 11-13).
5
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