Multilamellar drug delivery systems
Patent 5447729 Issued on September 5, 1995. Estimated Expiration Date: 
April 7, 2014. 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.
April 7, 2014. 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 ReferencesControlled release dosage form Sustained release pharmaceutical composition Enteric formulations of physiologically active peptides and proteins Patent #: 5350741 InventorsAssigneeApplicationNo. 224340 filed on 04/07/1994US Classes:424/490, Coated (e.g., microcapsules)424/463, Coated capsules424/469, Discrete particles in supporting matrix424/476, Containing waxes, higher fatty acids, higher fatty alcohols, or derivatives thereof (e.g., chocolate)424/489Particulate form (e.g., powders, granules, beads, microcapsules, and pellets)ExaminersPrimary: Page, Thurman K.Assistant: Benston, William E. Jr. Attorney, Agent or FirmInternational ClassA61K 009/16AbstractA pharmaceutical preparation including a pharmaceutical agent incorporated into particles comprising (i) a core formed from a hydrophilic material, a hydrophobic material or a hydrophobic emulsion or dispersion and (ii) an alternating sequence of hydrophilic/hydrophobic layers thereon such that there is a hydrophilic/hydrophobic interface between the core and each succeeding layer. | |
