Appeal No. 1999-1942
Application 08/770,037
Examiner states that tracking is a surface phenomenon and, so,
the oxide would be added to the outer insulation layer (FR8;
EA7-8). The Examiner contends that "it is implied by Penneck,
that his treatment is only for the outer insulation layer,
because it would not make sense to apply it to an inner
insulation layer where tracking would never occur" (EA8) and
"that when, as in Foster's device, there are two separate
insulating sections, an inner and an outer, then only the
layers . . . of the outer section would be treated by the
additive of Penneck, because it would make no sense to treat
the layers of the inner section" (EA8).
Appellants argue that none of the references provides
motivation for limiting the oxide filler to certain regions of
Penneck's polymer insulating material, much less to one or
more oxide-filled mica tape layers interleaved with one or
more oxide-free mica tape layers (Br12). It is argued that
Penneck requires the oxides to be used in combination with a
hydrate of alumina and therefore cannot be said to suggest the
use of oxides alone (Br 13-14). It is further argued that
Penneck employs a polymeric (i.e., non-mica) insulating
material and disperses the non-tracking additive (containing
- 6 -
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007