Sustained release preparation comprising a foamed capillary tube
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United States of America Patent
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Sep 15, 2015
Grant Date -
Aug 7, 2008
app pub date -
Apr 11, 2007
filing date -
Apr 11, 2006
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Abstract
Provided is a sustained release preparation capable of uniformly releasing therefrom a volatile chemical for a long period of time even if the amount of a liquid chemical remaining in a tubular container of the sustained release preparation becomes small. Also provided is a container for sustained release preparation, the container being tubular and comprising two layers of outer and inner layers, the inner layer having a thickness of 0.12 to 1.2 mm and having a foamed structure permitting the soaking-up of a liquid chemical to a height of at least 25 mm by capillarity. Also provided is a container unit for sustained release preparation, the unit comprising two or more of the container combined.
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