초록 ▼

A device for effecting the delayed release of an active ingredient comprises a container and, within, a dispersible unit of ingredient, a removable closure and a electrical control circuit for removal of said closure at a designated time to release the active ingredient. Several assemblies are combi

A device for effecting the delayed release of an active ingredient comprises a container and, within, a dispersible unit of ingredient, a removable closure and a electrical control circuit for removal of said closure at a designated time to release the active ingredient. Several assemblies are combined to control the administration of veterinary medicaments to ruminant animals as a specific application of the invention.

대표청구항 ▼

A delayed release, ruminant dosage form comprising from 1 to 4 dosage unit release assemblies, at least one of which is a delayed action assembly which, in turn, comprises; a closed, non-biodegradable outer wall; a dosage unit of an active ingredient in dispersible form within said wall; a water-tig

A delayed release, ruminant dosage form comprising from 1 to 4 dosage unit release assemblies, at least one of which is a delayed action assembly which, in turn, comprises; a closed, non-biodegradable outer wall; a dosage unit of an active ingredient in dispersible form within said wall; a water-tight cover or plug which is capable of being displaced by internal gas pressure and which extends through said outer wall; weight means sufficient to retain said delayed action assembly in the rumen and arranged within said dosage form, and an internally disposed electrical circuit means which, in turn, comprises, interconnected; a source of current; an internally disposed chemical squib for generating internal gas pressure, within the assembly, sufficient to remove said removable cover or plug; means for timing and activating said chemical squib, and means for activating said circuit.