Appeal No. 2000-1433
Application No. 09/027,074
ether dye having an azo group linking a substituted 3-
hydroxypyridine nucleus to a phenyl nucleus wherein the phenyl
nucleus has an ether substituent ortho to the azo group and the
phenyl nucleus is free of strong electron withdrawing groups.
Further details concerning this appealed subject matter are set
forth in representative independent claim 1 which reads as
follows:
1. An optical recording element having a
transparent substrate and on the surface of said substrate,
a recording layer, a light reflecting layer; wherein the
recording layer (a) comprises a (i) a metallized azo
ether dye having an azo group linking a substituted
3-hydroxypyridine nucleus to a phenyl nucleus wherein the
phenyl nucleus has an ether substituent ortho to the azo
group and said phenyl nucleus is free of strong electron
withdrawing groups and (ii) a cyanine dye and (b) has, when
unrecorded, a refractive index at a selected wavelength from
400 to 660 nm, comprising a real part (n) greater than 1.8
and an imaginary part (k) less than 0.2.
The references set forth below are relied upon by the
examiner as evidence of obviousness:
Ichikawa et al. (Ichikawa) 4,906,498 Mar. 6, 1990
Takahashi et al. (Takahashi) 4,939,011 Jul. 3, 1990
Chapman et al. (Chapman) 5,500,325 Mar. 19, 1996
Bailey et al. (Bailey) EP 0 053 037 A2 Jun. 2, 1982
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