Diffusional active agent dispenser

A - Human Necessities – 61 – D

Patent

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128/104

A61D 7/00 (2006.01)

Patent

CA 1128897

DIFFUSIONAL ACTIVE AGENT DISPENSER Abstract Diffusional active agent dispensers comprising an outer microporous wall that defines an inner compartment that contains a water soluble active agent composition and an expandable member that expands when it absorbs water is disclosed. The inclusion of the expandable member in the compartment helps maintain the solution of active agent composition in a saturated state, thereby keeping the release rate of agent from the dispenser constant. 4:130:22 A-l 1/30/80

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