Appeal No. 98-3269
Application No. 08/703,266
1. A process for the preparation of resin particles
comprising:
heating a mixture comprised of a free radical initiator
compound, at least one stable free radical compound, at least
one free radical polymerizable monomer compound, and at least
one free radical polymerizable crosslinking compound;
and cooling the mixture, wherein the resulting product
resin particles are crosslinked and are comprised of
polymerized monomers and at least one crosslinking compound,
and wherein the particles have a narrow particle size
distribution of from about 1.1 to about 2 geometric size
distribution (GSD), a narrow pore size distribution of from
about 10 to about 1,000 nanometers, and a high monomer to
polymer conversion of from about 10 to about 100 percent.
The examiner relies upon the following references as
evidence of obviousness:
Wada et al. (Wada) 5,104,764 Apr. 14, 1992
Georges et al. (Georges) 5,322,912 Jun. 21, 1994
Appellants' claimed invention is directed to a process
for preparing resin particles having a specific particle size
distribution. The process comprises heating a mixture
comprising a free radical initiator compound, a stable free
radical compound, a free radical polymerizable monomer and a
free radical polymerizable crosslinking compound, such as
divinyl benzene.
Appealed claims 1-14 and 16-20 stand rejected under
35 U.S.C. § 112, first paragraph, as being based upon a non-
-2-
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