Appeal 2007-0128
Reexamination Control 90/006,208
Patent 5,573,648
(Id. at col. 4, line 56 to col. 5, line 2, bold emphasis added).
22) Grot has three independent claims, claims 1, 11 and 12.
23) While Grot claim 11 is limited to a fuel cell, Grot claims 1 and 12 are not.
Specifically, the preambles of Grot independent claims 1, and 12 are as follows:
1. "An electrode composition comprising:"
12. "A membrane and electrode structure comprising:"
(Id. at claims 1, and 12).
iii. Uchida, U.S. Patent 5,474,857
24) Uchida teaches that solid polymer electrolytes can be used in gas sensors.
Specifically, Uchida states:
In addition, the assembly of the solid polymer electrolyte and the
electrode of the present invention can be effectively applied to
generators or purifiers of gases such as oxygen, ozone and hydrogen
and various gas sensors such as oxygen sensors and alcohol sensors.
(Id. at col. 10, lines 60-64).
25) Uchida teaches that its electrodes contain at least a noble metal catalyst, a
carbon powder and a solid polymer electrolyte. (Id. at col. 3, lines 46-56).
26) Uchida describes the following “conventional” membrane and electrode cell:
14
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