Appeal No. 2002-0429
Application No. 08/847,138
page 5, lines 6-15). The examiner has also taken Official Notice
that the compounds of claims 31 and 32 are known in this art.
(Id., page 4, lines 18-19). The examiner has further found that
Egusa teaches using multiple hole injecting/transport layers with
different ionization potentials, increasing from anode to emitting
layer (Examiner’s answer, page 5, last line - page 6, line 4).
Finally, the examiner has found that Ito and Arai teach that
improvement of adhesion in an electroluminescent device improves
performance (Examiner’s Answer, page 6, lines 4-7)
The examiner then concludes that it would have been obvious
to one of ordinary skill in the art at the time the invention was
made to make an electroluminescent device comprising a
multilayered hole transporting layer wherein the hole transporting
layer in contact with the indium tin oxide (ITO) anode comprises
the compounds of claims 31 and 32. One would have been motivated,
it is reasoned, by Mori’s teachings that the hole injecting or
transporting layer may be multilayered and comprised of a hole
moving and donating agent, and because the specific compounds of
claims 31 and 32 are either explicitly disclosed or known in the
art and the multilayered hole injecting and transport layer is
taught. (Examiner’s Answer, page 5, lines 6-16).
The appellants, on the other hand, assert that even if the
combined references suggest optimizing the progression of energy
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