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Method of making controlled release devices

  • US 5,788,977 A
  • Filed: 02/21/1997
  • Issued: 08/04/1998
  • Est. Priority Date: 02/23/1996
  • Status: Expired due to Term
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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