Appeal No. 2002-1191
Application No. 09/101,175
BACKGROUND
According to Appellants, the invention relates to an electrochemical sensor and a
method of production of an electrochemical sensor. The electrochemical sensor measures
the gas concentration, such as oxygen, of a sample gas. The invention is said to have the
advantage of preventing liquid and solid components contained in the sample gas from
penetrating the interior sensor. (Brief, p. 3). Claim 44, which is representative of the
claimed invention, appears below:
44. An electrochemical sensor for measuring a gas concentration of a sample
gas, comprising:
an electrochemical element including:
an electrochemical pump cell having a first electrode, a second electrode and a
gas chamber in fluid communication with the sampled gas via a gas inlet
opening, the gas chamber containing one of the first electrode and the second
electrode,
wherein the electrochemical sensor is produced by:
providing the sampled gas to the gas chamber of the electrochemical pump cell
via the gas inlet opening,
completely covering the gas inlet opening with a covering layer, and
after the gas inlet opening is covered, applying a porous cover over the gas
inlet opening so that the porous cover completely covers the gas inlet opening.
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