Particle delivery
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United States of America Patent
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-
Jan 11, 2000
Issued Date -
N/A
app pub date -
Apr 24, 1997
filing date -
Oct 20, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A needleless syringe particle delivery system is provided. The needleless syringe comprises an elongate nozzle which is connected at its upstream end to an open ended capsule chamber. The capsule chamber is configured to house and intimately enclose a nonrigid capsule containing particles of a therapeutic agent. An opening means is provided at the upstream end of the capsule chamber, and is used to pierce the upstream end of a capsule in the chamber. After the capsule is opened, an energizing means connected to the upstream end of the capsule chamber applies a gaseous pressure sufficient to force the particles out of the capsule and the open downstream end of the capsule chamber and thus to create through the nozzle a supersonic gas flow in which the particles are entrained.
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