Patents by Inventor Francis C. Szoka

Francis C. Szoka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Plant nutriment compositions and method of their application
    Patent number: 4394149
    Abstract: The disclosure is of the use of plant nutriments encapsulated in synthetic lipid vesicles to nourish plants. SPCROSS-REFERENCE TO RELATED APPLICATIONThis application is a Continuation-in-Part of our copending application Ser. No. 881,116 filed Feb. 24, 1978 and now U.S. Pat. No. 4,235,871.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: July 19, 1983
    Inventors: Francis C. Szoka, Jr., Demetrios P. Papahadjopoulos
  • Method of encapsulating biologically active materials in lipid vesicles
    Patent number: 4241046
    Abstract: The disclosure is of a method for encapsulating biologically active materials in synthetic, oligolamellar lipid vesicles (liposomes). The method comprises providing a mixture of lipid in organic solvent and an aqueous mixture of the material for encapsulation, emulsifying the provided mixture, removing the organic solvent and suspending the resultant gel in water. The method of the invention is advantageous over prior art methods of encapsulating biologically active materials in that it provides a means for a relatively high capture efficiency of the material for encapsulation. The disclosure is also of intermediate compositions in the encapsulation method, the product vesicles, compositions including the product vesicles as an active ingredient and their use.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: December 23, 1980
    Inventors: Demetrios P. Papahadjopoulos, Francis C. Szoka, Jr.
  • Method of encapsulating biologically active materials in lipid vesicles
    Patent number: 4235871
    Abstract: The disclosure is of a method for encapsulating biologically active materials in synthetic, oligolamellar lipid vesicles (liposomes). The method comprises providing a mixture of lipid in organic solvent and an aqueous mixture of the material for encapsulation, emulsifying the provided mixture, removing the organic solvent and suspending the resultant gel in water. The method of the invention is advantageous over prior art methods of encapsulating biologically active materials in that it provides a means for a relatively high capture efficiency of the material for encapsulation. The disclosure is also of intermediate compositions in the encapsulation method, the product vesicles, compositions including the product vesicles as an active ingredient and their use.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: November 25, 1980
    Inventors: Demetrios P. Papahadjopoulos, Francis C. Szoka, Jr.