Appeal No. 2004-2008
Application No. 09/955,030
Bergmann discloses a process for producing doped tin oxides that
have desirable transparency, electrical conductivity and antistatic
characteristics. (Col. 1, ll. 57-62). Bergmann discloses “[t]hin films or
coatings containing electroconductive powders can also be used within
polymer films or fibers, magnetic recording tapes, on work surfaces and in
paints to impart electroconductive properties”. (Col. 2, ll. 20-24).
Bergmann does not disclose that the electroconductive powders can be
used as a resistivity controlling agent.
We recognize that the Examiner asserts environmental benefits can
be obtained by doping tin oxide with tantalum rather than antimony
containing tin oxide. However, there is no indication that the specially
formed Ta-doped tin oxide disclosed in Bergmann could have been
surface treated as disclosed in Rokutanzono. (See column 2). Further,
there is no indication what effects the specially formed Ta-doped tin oxide
disclosed in Bergmann would have on the other properties of the
protective layer of Rokutanzono. Thus, there is insufficient evidence to
establish that the Ta-doped tin oxide disclosed in Bergmann would have
been suitable for use as a resistivity controlling agent in the surface layer of
the photosensitive member of Rokutanzono.
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