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Ultrasonically modulated polymeric devices for delivering compositions

  • US 4,779,806 A
  • Filed: 11/28/1986
  • Issued: 10/25/1988
  • Est. Priority Date: 07/23/1984
  • Status: Expired due to Term
First Claim
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1. A process for delivering a composition on demand which comprises:

  • incorporating said composition within a polymeric matrix,surrounding said composition and polymeric matrix with a liquid medium, andexposing said polymeric matrix to ultrasonic energy for a predetermined time and at a frequency to effect cavitation of said polymeric matrix to release said composition from said matrix in a controlled manner over a specific time period.

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