NEW CONTROLLED RELEASE BEAD, A METHOD OF PRODUCING THE SAME AND MULTIPLE UNIT FORMULATION COMPRISING IT.

Mexico Patent

APP PUB NO MX-PA02004574-A
SERIAL NO

PA02004574

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Abstract

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A controlled release bead comprises: (i) a core unit of a substantially water-soluble or water-swellable inert material; (ii) a first layer on the core unit of a substantially water-insoluble polymer; (iii) a second layer covering the first layer and containing an active ingredient; and (iv) a third layer of polymer on the second layer effective for controlled release of the active ingredient, wherein the first layer is adapted to control water penetration into the core. A method of producing the controlled release bead is also disclosed.

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Patent Owner(s)

Patent OwnerAddress
PHARMACIA ABSES-171 97 STOCKHOLM STOCKHOLM

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Inventor(s)

Inventor Name Address
GREN TORKEL KALAMAZOO MI 49009

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