Controlled-release device and preparation process
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United States of America Patent
Stats
-
Jul 7, 1998
Grant Date -
N/A
app pub date -
Jan 19, 1996
filing date -
Jan 23, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Device capable of being used in combination with a restraining or ornamental collar or with any other support for animals, intended to make possible the controlled and optically continuous and complete release of chemical substances, including medicaments, for more or less lengthy, continuous or noncontinuous, periods and process for producing the said device. The device comprises a polymeric matrix enclosing at least one active substance capable of being released towards an appropriate area of an animal. The device is composed of at least one tubular component of any cross-section, containing at least one layer of flexible polymeric matrix containing at least one active substance, the length of the said tubular component can be regulated to adjust the daily dose of the active substance to the weight of the animal and the ratio of the external surface area of said tubular component to the thickness of its' wall is as great as possible to obtain linear removal of the active substance.
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