Appeal No. 2003-1932 Page 3
Application No. 09/436,179
Having carefully considered each of appellants* arguments
set forth in the brief and reply brief, appellants have not
persuaded us of reversible error on the part of the examiner.
Accordingly, we will affirm the examiner’s rejection for
substantially the reasons set forth by the examiner in the
answer. We add the following for emphasis.
Like appellants, Tamatani discloses a method for coating
luminescent material with magnesium oxide. Tamatani forms an
aqueous suspension of the luminescent material that contains a
water soluble magnesium salt, increases the pH of the suspension
sufficiently to form magnesium hydroxide, separates magnesium
hydroxide coated luminescent material therefrom and heats the
separated material (calcining) to form a surface treated
(magnesium oxide coated) phosphor (luminescent material). See
Example 4 of Tamatani.
While Tamatani discloses a preliminary step of forming a
solution of the magnesium salt (Example 4), the examiner noted
that Tamatani does not expressly disclose the preliminary
formation of an aqueous suspension of the luminescent material
and adding the magnesium salt solution thereto, as here claimed.
Rather, Tamatani exemplifies (Example 4) a suspension formation
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