Appeal No. 1997-1515
Application 08/361,891
other claim remaining in the application, stand withdrawn from
consideration by the examiner as being directed toward a
nonelected invention.
THE INVENTION
Appellant claims a process for making an electrophoretic
fluid which is suitable for use in an electrophoretic display.
Claim 49 is illustrative and reads as follows:
49. A process for forming an electrophoretic fluid for
use in an electrophoretic display, comprising:
admixing a first monomer and a crosslinker in a
dispersion medium; said dispersion medium being a polar
solvent selected from the group consisting of alcohols,
ethers, halogenated hydrocarbons, ketones and esters;
adding an initiator and a stabilizer to said dispersion
medium so that said first monomer polymerizes to form
dielectric polymer particles;
introducing a second monomer and a functional monomer to
said dispersion medium, said second monomer and said
functional monomer at least partially polymerizing and
grafting upon said dielectric polymer particles to provide
said particles with a surface functionality that is suitable
for charging in an electrophoretic display;
separating said dielectric polymer particles from said
dispersion medium; and
dispersing said dielectric particles in a dielectric non-
polar solvent, said dielectric non-polar solvent being
different from said dispersion medium.
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