Method of making controlled release devices
First Claim
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1. A method of making a device which releases an active material suitable for treating the human or animal body at a controlled rate comprising:
- forming a closed hollow envelope having an empty space therein from an uncured silicone containing material;
curing said closed hollow envelope, said closed container being permeable to the active material; and
introducing an active material into the empty space of the closed hollow envelope.
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Abstract
A process is disclosed for making devices which release active material, e.g. a drug, at a controlled rate, which device comprises a closed container and the active material. The device is made by first making a hollow envelope, e.g. by extrusion or moulding, followed by introducing the active material into the void of the envelope. The device may have a ring or cylindrical form.
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Citations
8 Claims
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1. A method of making a device which releases an active material suitable for treating the human or animal body at a controlled rate comprising:
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forming a closed hollow envelope having an empty space therein from an uncured silicone containing material; curing said closed hollow envelope, said closed container being permeable to the active material; and introducing an active material into the empty space of the closed hollow envelope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification