Method of preparing sustained-release pharmaceutical/preparation
Patent 4853249 Issued on August 1, 1989. Estimated Expiration Date: 
November 10, 2006. 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.
November 10, 2006. 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 References 2921883 3115441 Encapsulated fragrances and flavors and process therefor Method for preparing a pharmaceutical controlled release composition Sustained release tablets and method of making same Patent #: 4684516 InventorsAssigneeApplicationNo. 06/928370 filed on 11/10/1986US Classes:427/2.19, Retarded or controlled-release layer produced (e.g., enteric)424/468Sustained or differential release typeExaminersPrimary: Silverberg, SamAttorney, Agent or FirmInternational ClassA61K 9/50 (20060101)Foreign Application Priority Data1985-11-15 JPAbstractA method of preparing a sustained-release pharmaceutical preparation, which comprises applying a solution of a binder in water or an alcohol and a fine powder of a hydrophobic solid material which does not easily dissolve within the stomach and intestines to the surface of solid particles containing a drug while the solid particles are being tumbled, thereby to coat the solid particles with the binder and the hydrophobic solid material. | |
