Appeal 2007-0414
Application 10/691,113
providing a first solution, the first solution comprising a first solute
dissolved or dispersed in a first solvent that is at least partially
soluble in the supercritical fluid;
flowing the supercritical fluid through a chamber having a rotating
rotor disposed therein;
dispensing the first solution into a mixing zone within the chamber
while the supercritical fluid is flowing through the chamber, the
mixing zone being defined as a space between an inner wall of
the chamber and an adjacent surface of the rotating rotor; and
collecting precipitated particles of the first solute from a mixture
comprising the supercritical fluid and the first solvent.
The Examiner relies upon the following references:
Holl US 6,471,392 B1 Oct. 29, 2002
Johnson US 2004/0091546 A1 May 13, 2004
Appellants’ claimed invention is directed to a method of producing
particles comprising dispensing a first solution into a mixing zone of a
chamber having a rotating rotor while a supercritical fluid is flowing through
the chamber. The mixing zone is the space between the inner wall of the
chamber and an adjacent surface of the rotating rotor. Particles are
precipitated from a mixture comprising the first solution and supercritical
fluid.
Appealed claims 1-5, 7-19, and 21-37 stand rejected under 35 U.S.C.
§ 102(e) as being anticipated by Johnson. Claim 6 stands rejected under
35 U.S.C. § 103(a) as being unpatentable over Johnson in view of Holl.
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