Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Composite or multiple layer
Reexamination Certificate
2007-02-06
2007-02-06
Vargot, Mathieu D. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Composite or multiple layer
C264S004100, C264S437000, C264S438000, C264S343000, C359S296000
Reexamination Certificate
active
10249483
ABSTRACT:
A method of making a multichromal sphere includes the steps of preparing a composition of at least (1) a matrix material and (2) at least two sets of particles, each of the sets of particles having a color different from at least one of another of the sets of particles and a segregation (e.g., an electrical or magnetic) property different from at least one of another of the sets of particles, encapsulating the composition within a shell to form an encapsulated sphere, immobilizing the encapsulated sphere in a manner to restrict at least rotation of the encapsulated sphere, subjecting the immobilized encapsulated sphere to an external field associated with the segregation property different among the sets of particles, under conditions in which the sets of particles are able to migrate within the matrix material, thereby producing color segregation in the immobilized encapsulated sphere, and solidifying the matrix material while substantially maintaining the color segregation. In the multichromal spheres, each of the sets of particles is segregated within a separate segment of the solidified matrix material of the core on the basis of the different segregation property.
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Chopra Naveen
Kazmaier Peter M.
Keoshkerian Barkev
Liebermann George
Mahabadi Hadi K.
Palazzo Eugene O.
Vargot Mathieu D.
Xerox Corporation
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