Interference No. 103,036
The Party Burroughs et al.'s Position
The party Burroughs et al. relies upon the following
testimony by Dr. Powers.
16. I have reviewed in particular
the embodiment 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 layers 30 and 32 are
applied to the side of the battery housing as
in Fig. 2. Sandwiched between the
nonconductive layers is a conductive layer 64
which has a reduced cross sectional area 65
in a sealed chamber or indicator zone 66. In
contact with the conductive layer is either a
color indicating heat sensitive material 70,
a pyrotechnic chemical 68, or the color
indicating heat sensitive material in
combination with the pyrotechnic chemical.
When this embodiment of the battery strength
indicator is electrically connected across
the terminals of the battery, current flows
through the conductive layer 64. Because the
conductive layer is reduced to a small cross
section 65 in the indicator zone 66, the
resistance of which is selected such that
current flow at a minimum predetermined
voltage will raise the area 65 to a
predetermined temperature, the heat generated
by the conductive layer raises the
temperature of the color indicating heat
sensitive material to a predetermined
temperature for color change to indicate the
voltage or strength of the battery.
17. The insulative or non-
conductive layers described in the Burroughs
'544 patent are present to shield components
of the strength indicator which transmit heat
and/or electricity, and are indicated as
doing so. For example, in the indicator
-32-
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