Appeal No. 1998-0870
Application No. 08/325,015
cathode ray tube (CRT) (page 2, lines 8-18; page 4, lines 6-9;
page 23, lines 5-13; Figure 1). Kinoshita also discloses that
the black colored electrically conductive fine powder (e.g.,
carbon black) may be of a black, gray, blackish gray, or
blackish brown shade and must possess conductivity (page 4,
lines 43-48). According to Kinoshita, the black colored
electrically conductive fine powder, particularly when it has
a conductivity higher than the antimony doped tin oxide
particles, generates light absorption (page 4, lines 27-42;
page 8, lines 1-5 and 37-42). Further, Kinoshita teaches that
dispersants such as anionic surfactants, cationic surfactants,
ampholytic surfactants, and non-ionic surfactants may be used
to disperse the carbon black fine powder, and that the
dispersant is preferably polymeric (page 5, lines 20-22). As6
in appellants’ claimed invention, Kinoshita also teaches a
uniform (i.e., homogeneous) aqueous mixture of the antimony
doped tin oxide and the black colored electrically conductive
fine powder (page 6, lines 28-32; page 10, lines 5-10; page
11, lines 39-44; page 13, lines 23-27).
6According to Armes, polymeric surfactants are often referred to in the
art as “steric stabilizers” (column 1, lines 19-24).
10
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