Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Primarily organic continuous liquid phase
Reexamination Certificate
2007-05-29
2007-05-29
Gulakowski, Randy (Department: 1712)
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous liquid or supercritical phase: colloid systems;...
Primarily organic continuous liquid phase
C252S587000
Reexamination Certificate
active
10312357
ABSTRACT:
The invention provides a color-developing composition without using a pigment or dye and capable of being colored sustainably and stably after mixing two liquid phases which are colorless before mixing. The composition consists of two discrete liquid phases, wherein the refractive index of each liquid phase is identical to each other at a point within the wavelength range from 400 nm to 800 nm, wherein a continuous layer and a dispersion layer are formed by mixing and dispersing said two phases whereby developing a color. Alternatively, the composition is a powder dispersion consisting of a liquid phase and a silica powder-containing solid phase, wherein said liquid phase has a refractive index n1and said silica has a refractive index n2, which satisfy Equation (1):in-line-formulae description="In-line Formulae" end="lead"?|n1−n2|<0.05 (1)in-line-formulae description="In-line Formulae" end="tail"?whereby developing a color on the basis of the difference in the refractive index at the interface between the liquid phase and the solid phase. The present invention also provides a cosmetic preparation, a fragrance product and a display article using the composition.
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Akimoto Makio
Fukui Hiroshi
Ohno Kazuhisa
Sakai Keiko
Sakiguchi Takayuki
Andrews & Kurth LLP
Chao Fei-Fei
Gulakowski Randy
Kugel Timothy J.
Shiseido Research Center
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