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Preparation and uses of multi-phase microspheres

  • US 5,288,502 A
  • Filed: 10/16/1991
  • Issued: 02/22/1994
  • Est. Priority Date: 10/16/1991
  • Status: Expired due to Fees
First Claim
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1. A delivery system for a protein, peptide, or drug with biodegradable multi-phase microspheres, said microspheres comprising a protein, peptide, or drug contained within a fixed oil and an essentially water insoluble, biodegradable polymeric matrix comprised of polylactic acid or polylactic glycolic acid wherein the polymeric matrix surrounds the fixed oil of the microsphere and wherein the fixed oil contains the protein, peptide, or drug.

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