Appeal No. 1996-1626
Application No. 07/642,848
BACKGROUND
The invention is directed to an optical disk formed of a plastic disk body containing
polycarbonate resin and an organic fluorescent coloring material. Claim 1 is reproduced below.
1. An optical disk subject to scanning by a laser beam for regenerating data stored in the form of
pits in the optical disk and comprising:
a plastic disk body having opposing first and second surfaces, wherein data is stored in the form
of pits in said first surface and said second surface is disposed to receive the laser beam;
a reflecting layer formed on said first surface, having said pits, of said plastic disk body;
a protecting layer covering said reflecting layer; and
said plastic disk body being formed of a material consisting essentially of polycarbonate resin
and an organic fluorescent coloring material, said organic fluorescent coloring material being in
an amount establishing a concentration in the range of from 0.005 to 1.000 weight percent of
the material and being dispersed homogeneously in said plastic disk body and, further, having a
light absorption characteristic of absorbing light of a wavelength shorter than the wavelength of
a selected color within the visible light spectrum and of not absorbing light of a wavelength
longer than that of the selected color, the laser beam having a wavelength near, but not within,
the visible light spectrum.
The examiner relies on the following reference :1
EPO Patent Publication 311,512 (EPO ‘512), published April 12, 1989
Claims 1, 3, and 5-10 stand rejected under 35 U.S.C. § 103 over EPO ‘512.
1The examiner has withdrawn a rejection based on an article published between appellants’ foreign
priority date and U.S. filing date. See “Second Supplemental Examiner’s Answer,” mailed January 27, 1997
(Paper No. 40).
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