Sustained-release preparations and the process thereof
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United States of America Patent
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Jun 11, 1991
Grant Date -
N/A
app pub date -
Jul 13, 1989
filing date -
Jul 18, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Sustained-release preparations essentially consisting of 1 part by weight of a water-soluble active ingredient and 1 to 10 parts by weight of two or more fats where the melting point is different in one from others, being capable of releasing active ingredients at a constant rate for a long-period of time, and being manufactured easily and economically.
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