Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from liquid or supercritical state – Having growth from a solution comprising a solvent which is...
Reexamination Certificate
2005-11-01
2005-11-01
Kunemund, Robert (Department: 1722)
Single-crystal, oriented-crystal, and epitaxy growth processes;
Processes of growth from liquid or supercritical state
Having growth from a solution comprising a solvent which is...
C117S069000, C422S245100, C023S29300R
Reexamination Certificate
active
06960256
ABSTRACT:
Small crystals are made by mixing a solution of a desired substance with an anti-solvent in a fluidic vortex mixer in which the residence time is less than 1 s, for example 10 ms. The liquid within the fluidic vortex mixer (12) is subjected to high intensity ultrasound from a transducer (20, 22) in or on the wall of the mixer, or coupled to a pipe supplying liquid to the mixer. The solution very rapidly becomes supersaturated, and the ultrasound can induce a very large number of nuclei for crystal growth. Small crystals, for example less than 5 μm, are formed that may be of a suitable size for use in inhalers.
REFERENCES:
patent: 3979269 (1976-09-01), Vassilev
patent: 5707634 (1998-01-01), Schmitt
patent: 2242376 (1991-10-01), None
patent: 96/32095 (1996-10-01), None
patent: 00/44468 (2000-08-01), None
Bowe Michael Joseph
McCausland Linda Jane
Stairmand John William
Accentus plc
Holt William H.
Kunemund Robert
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