Appeal No. 98-2398
Application No. 08/815,251
an axis 111, and with an arcuate radial profile
generally symmetrical about the axis 111.
With this understanding of what constitutes an
ignition "droplet," we look to Duguet and note that this
patent refers to a thermosensitive substance (104) that is
applied "in the form of a fine layer of an explosive varnish"
(col. 3, lines 57-61) that covers ohmic heating element or
resistive heating strip (110). In addition, Duguet indicates
(col. 3, lines 66+) that the explosive varnish is made by
mixing a "film-generating binder" (after it is put into
solution in an appropriate solvent) with the explosive
substance, with the mixture then being deposited on the
resistive flat strip (110). Thereafter, the varnish solvent
is evaporated so as to form an explosive "thin layer" (col. 4,
line 6) that is hard and that adheres well. In contrast to
the examiner’s position (answer, page 5) that "the element 104
disclosed in the Duguet reference is shown in Figure 1 in the
form of a ‘droplet’," we conclude, as appellant has (reply
brief, page 2), that the thin or fine layer of thermosensitive
substance (104) in Duguet is not shown, described, or
suggested as taking the form of the claimed "ignition droplet"
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