DEVICE FOR RELEASING WITH DELAYED EFFECT AN ACTIVE SUBSTANCE, IN PARTICULAR VETERINARY
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United States of America Patent
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Jul 9, 2002
Grant Date -
Jul 25, 2002
app pub date -
Apr 21, 1999
filing date -
Oct 21, 1996
priority date (Note) -
Granted
status (Latency Note)
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Abstract
The invention concerns a device for dispensing an active substance to be used in a biological medium, in particular in the rumen of an animal, comprising: a sealed receptacle (1, 21, 41, 71, 81, 100, 120, 130) for containing the said substance, and having at least one opening; means for provisionally closing the opening of said receptacle, said closing means being maintained closed by at least one biodegradable element (13, 23, 45, 55, 65, 78, 89, 109, 113, 125, 135), such that subsequent to the biological degradation of said element, the closing means completely releases said opening.
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