Method for delivering an active ingredient by controlled time release utilizing a novel delivery vehicle which can be prepared by a process utilizing the active ingredient as a porogen
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United States of America Patent
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-
Sep 1, 1987
Grant Date -
N/A
app pub date -
Oct 4, 1985
filing date -
Oct 4, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Delivery vehicles comprised of a polymeric bead having a network of pores with an active ingredient held within the network are provided for use in a method to provide controlled release of the active ingredient. The network of pores is substantially non-collapsible upon removal of the active ingredient and the delivery vehicles are polymerized by a process in which the active ingredient also comprises the porogen during formation of the network of pores.
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