Appeal No. 1997-3646 Page 5
Application No. 08/172,521
may be useful as a charge transport compound therein including
aromatic amine compounds of the formulas as set forth at pages
6 and 7 of the published European Patent Application.
Lindblad points out that the charge transport compound may
include hydroxy groups for reacting with the binder. See,
e.g., page 6, lines 15 and 16 and page 7, lines 4-17 of
Lindblad. However, as acknowledged by the examiner (answer,
page 7), Lindblad “does not exemplify the use of hydroxy-
containing charge transporting molecules in said overcoat
layer as described in the instant claims;” that is, a hydroxy
triphenyl methane type compound. Also, Lindblad does not
explicitly describe the herein
claimed requirement that the charge transport layer be
substantially free of triphenyl methane molecules while a
hydroxy
triphenyl methane type compound is used in the overcoat layer.
Takei describes a positively charging electrophotographic
photosensitive material that is made by “sequentially
laminating a charge transport layer, a charge generating layer
and a protective layer if desirable on a conductive support”
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