Topical patch for liposomal drug delivery system
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United States of America Patent
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Feb 17, 1998
Grant Date -
N/A
app pub date -
Nov 21, 1994
filing date -
Jun 1, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for the dermal and transdermal delivery of liposomes or a formulation thereof. The device comprises an applicator element carrying a containment means to store the liposomes, a liposome delivery surface for the containment means to transfer the liposomes from storage to the skin when the surface is brought into operating proximity therewith and a detachable cover means for the surface. Preferably, the device comprises a screen covering the containment means. The screen is characterized in that it is sufficiently hydrophobic to constitute a barrier for preventing passage of the liposomes when the screen is not in contact with the skin. It also has a plurality of pores of sufficient diameter to allow passage of the liposomes through the screen when the screen is in contact with the skin.
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