Appeal No. 1996-3277
Application No. 08/143,373
claims is dismissed.
The claims remaining on appeal are claims 14-16 and 18-
24. Claim 14 is illustrative.
14. A method of producing a soft hydrogel colored
contact lens comprising:
preparing a dispersion by:
dissolving in an organic solvent from 1 to 90%
by weight of a polymerized thermoplastic material in
the solvent which material is compatible with the
monomer material to be used in the lens so as to
produce a resin system of the thermoplastic material
in the organic solvent,
dispersing in the resulting resin system from
about 1 to about 80% by weight of the resin system
of a coloring material which is insoluble in the
monomer material to be used to form the lens so as
to form a dispersion, and
incorporating in said dispersion an amount of a
thixotropic agent sufficient to prevent the
dispersion from running when applied on the surface
of the mold,
applying the resulting dispersion produced above to
imprint an iris simulating pattern on a surface of a casting
mold,
evaporating the organic solvent from the dispersion,
introducing a monomeric lens forming liquid in said mold
in contact with said imprinted surface wherein said monomer
2
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