Appeal 2007-0128
Reexamination Control 90/006,208
Patent 5,573,648
diameter and a 0.6 mm thick membrane. (Id. at col. 11, ll. 58-67).
14) Dempsey does not describe Atwood=s claimed mixed ionic-electronic
conductive electrodes.
ii. Grot, U.S. Patent 5,330,860
15) Grot describes a membrane and electrode structure. (Grot ‘860, Title
"Membrane and electrode structure.").
16) Grot teaches that membrane and electrode cells are well known in the art and
are useful for a variety of purposes, including fuel cells and gas sensing devices.
Specifically, Grot states that:
So-called "M & E cells" are electrochemical cells employing a
membrane and electrode structure. Such cells can be operated as an
electrolytic cell for the production of electrochemical products, or
they may be operated as fuel cells for the production of electrical
energy, gas generating devices and processes, chemical synthesis
devices, chemical treatment and processing devices and methods, gas
dosimeters and sensing devices and the like. Electrolytic cells may,
for example, be used for the electrolysis of an alkali metal halide such
as sodium chloride or for the electrolysis of water. M & E cells are
well known in the art.
(Id. at col. 1, ll. 19-30).
17) Dempsey identifies U.S. Pat. 3,297,484 (>484) and U.S. Pat. 3,134,697
(>697) as describing electrodes for gas sensors. Grot identifies the >484 and >697
patents, as well as others, as suffering from problems. Specifically, Grot states
11
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