Interference No. 103,036
material, the device can also be fabricated with the
pyrotechnic chemical alone, thereby causing a slight
charring to the strip which is noticeable. One of
the strips can also be made of a material that is
sensitive to temperature and will undergo a visible
change when the temperature exceeds a predetermined
value. Alteratively, the device can be fabricated
without the pyrotechnic chemical, relying on the
color-indicating, heat-sensitive material alone to
indicate whether the battery has a predetermined
minimal voltage output. If the color indicating,
heat-sensitive material undergoes a non-permanent
color change when exposed to a predetermined
temperature, then the battery-strength indicator
device of FIG. 10D can be used repeatedly to
determine if the output voltage of the battery meets
a predetermined voltage level. [Emphasis added.]
The Party Burroughs et al.’s Position
The party Burroughs et al. urges that its specification
contains a sufficient written description for the limitation in
question, "thermal insulating," and equivalents thereof and
relies upon the testimony of Dr. Powers, an expert witness for
the party Burroughs et al. Dr. Powers testified as follows at
BR 32 to 39:
16. I have reviewed in particular the embodi-
ment of the battery strength indicator shown in Fig.
10 of the Burroughs '544 patent and described in the
specification in column 4, lines 21-38 and column 8,
line 26 through column 9, line 3. As described
therein, first and second nonconductive strips or
-39-
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