Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten...
Reexamination Certificate
2007-01-16
2009-12-22
Theisen, Mary Lynn F (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
C425S006000
Reexamination Certificate
active
07635442
ABSTRACT:
An apparatus is described for micron and submicron particles formation of a substance using the GAS process, comprising a particles formation vessel (22) and means for introducing a solution of the substance and a supercritical fluid into the particles formation vessel (22), wherein said means comprise a nozzle (27) having a central orifice (39) serving to carry a flow of solution, and a plurality of separate outer orifices (41) serving to carry a flow of pure supercritical fluid or a flow of supercritical fluid mixed with a modifier, such that the solvent is extracted from the solution by the supercritical fluid and precipitation of micron and submicron particles occurs. Also a process is described, carried out with such an apparatus.
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Del Re Giovanni
Di Giacomo Gabriele
Di Palma Cesare
Putrignano Matteo
Dompe Pha.R.MA S.p.A.
Lowe Hauptman & Ham & Berner, LLP
Theisen Mary Lynn F
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