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Therapeutic delivery systems related applications

  • US 5,542,935 A
  • Filed: 11/30/1993
  • Issued: 08/06/1996
  • Est. Priority Date: 12/22/1989
  • Status: Expired due to Term
First Claim
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1. An apparatus for making therapeutic containing liposomes filled with a gaseous precursor, comprising:

  • a) a vessel;

    b) means for introducing an aqueous solution comprising a lipid and a therapeutic compound into said vessel;

    c) means for introducing a gaseous precursor into said vessel;

    d) means for instilling said gaseous precursor into said aqueous solution in said vessel; and

    e) cooling means for cooling said aqueous solution below the gel to liquid crystalline phase transition temperature of said lipid in said aqueous solution and for maintaining said gaseous precursor in said vessel at a temperature below its liquid to gas phrase transition temperature during said instillation of said gaseous precursor into said aqueous solution, thereby producing a foam containing gaseous precursor-filled liposomes within said vessel.

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