Appeal No. 1998-0870
Application No. 08/325,015
coating which can adhere firmly to the display
screen, is substantially mechanically durable
and scratch resistant, resistant to solvents and
cleaning agents and exhibits suitable optical
properties such as bringing the light
transmission to a desired value (column 1, lines
30-47). . . . It would have been obvious to one
of ordinary skill in the art at the time of the
invention to use a steric stabilizer as taught
by Armes et al. when using conductive polymers
as suggested by Wessling and De Boer in the
apparatus of Kinoshita to prevent precipitation”
(Answer, pages 4 and 5).
On the other hand, appellants argue that “[t]here is nothing
in this combination of references that would lead a person of
ordinary skill in the art to provide on the surface of a
display screen of a display device an antistatic light-
absorbing coating predominantly consisting of latex particles
of polypyrrole and antimony-doped tin oxide particles” (Brief,
page 6).
As correctly found by the examiner, Kinoshita discloses a
coating material for use in the formation of an
antistatic/high refractive index film comprising a fluid
containing a mixture of an antimony doped tin oxide fine
powder and a black colored electrically conductive fine powder
(page 3, lines 31-36; page 21, lines 36-38). The film can be
used on various substrates including display screens such as a
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