Method of preparing controlled-release preparations for biologically active materials and resulting compositions
June 18, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of enhancing the administration of pharmalogically active agents Bile acid emulsions Method of preparing a controlled-release pharmaceutical preparation, and resulting composition Compositions containing aqueous dispersions of lipid spheres Method of encapsulating biologically active materials in lipid vesicles Method of encapsulating biologically active materials in lipid vesicles Solid formulations containing pheromones and method of using same Magnetically-localizable, biodegradable lipid microspheres Lipid membrane drug delivery Patent #: 4377567 InventorsApplicationNo. 540441 filed on 06/18/1990US Classes:424/450, Liposomes264/4.1, Liquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)424/45, Organic pressurized fluid424/84, BAITS, ATTRACTANTS, OR LURES (NON-FOOD)424/498, Containing waxes, higher fatty acids, higher fatty alcohols, or derivatives thereof424/501, Contains solid synthetic resin428/402.2, Microcapsule with fluid core (includes liposome)436/829, LIPOSOMES (E.G., ENCAPSULATION, ETC.)514/963, Microcapsule-sustained or differential release514/965, Discrete particles in supporting matrix514/966, RECTAL514/974CONTAINING DESIGNATED INGREDIENT TO REDUCE NOXIOUS EFFECTS OF ACTIVE INGREDIENT (E.G., TASTE MASKING, ODOR REDUCING, ETC.)ExaminersPrimary: Lovering, Richard D.Attorney, Agent or FirmForeign Patent References
International ClassesA61K 009/127A61K 037/22 B01J 013/06 Foreign Application Priority Data1982-11-26 SEAbstractA method and product for preparing a controlled-release composition are provided. The method comprises formation of a mixture containing at least one amphiphilic substance capable of forming a liquid crystalline phase, in contact with a liquid selected from the group consisting of water, glycerol, ethylene glycol, propylene glycol and mixtures thereof. The method includes a step of providing in such mixture a bioactive material. Preferred controlled-release compositions include an alkylbetaine zwitterionic surfactant therein.Other References
Field of SearchLiquid encapsulation utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)Solid-walled microcapsule formed by physically removing a constituent (e.g., evaporation, extraction, etc.) Microcapsule with fluid core (includes liposome) BAITS, ATTRACTANTS, OR LURES (NON-FOOD) Liposomes Containing waxes, higher fatty acids, higher fatty alcohols, or derivatives thereof Contains waxes, higher fatty acids, higher fatty alcohols LIPOSOMES (E.G., ENCAPSULATION, ETC.) Microcapsule-sustained or differential release Discrete particles in supporting matrix |
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