Rate controlling membranes for controlled drug delivery devices
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United States of America Patent
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Apr 23, 2002
Grant Date -
N/A
app pub date -
Dec 17, 1998
filing date -
Dec 22, 1997
priority date (Note) -
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Abstract
This invention provides rate controlling membranes for controlled drug delivery devices that are stable over time and exhibit more predictable and consistent membrane functionality. According to another aspect, the membranes have enhanced permeability. According to the invention, the rate controlling membrane of a controlled drug delivery device is subjected to a pre-treatment annealing process wherein it is subjected to an elevated temperature for a predetermined time period and subsequently cooled to ambient conditions before incorporation into a controlled drug delivery device.
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