Controlled release powder and process for its preparation
October 11, 2011. 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 ReferencesPermanent suspension pharmaceutical dosage form Coated particles Oral suspension of phenytoin Aluminum ibuprofen pharmaceutical suspensions Zinc aminophylline and its use in the treatment of bronchospasms Inert cross-linked copolymer support, its preparation process and its use for producing delayed action medicaments Controlled release powder and process for its preparation Pharmaceutical mixture Patent #: 4994260 InventorsAssigneeApplicationNo. 537065 filed on 07/09/1990US Classes:424/419, Natural or synthetic resin424/486, Synthetic polymer424/487, Acrylic acid and derivatives424/488, Polysaccharides (e.g., cellulose, etc.)424/497, Containing solid synthetic polymers424/501, Contains solid synthetic resin424/502, Contains waxes, higher fatty acids, higher fatty alcohols514/974CONTAINING DESIGNATED INGREDIENT TO REDUCE NOXIOUS EFFECTS OF ACTIVE INGREDIENT (E.G., TASTE MASKING, ODOR REDUCING, ETC.)ExaminersPrimary: Page, Thurman K.Assistant: Harrison, R. Attorney, Agent or FirmInternational ClassesA61K 009/58A61K 009/60 Foreign Application Priority Data1984-10-30 IEAbstractA controlled release powder containing discrete micro-particles for use in edible, pharmaceutical and other controlled release compositions is disclosed. The micro-particles have an average size in the range of from 0.1 to 125 μm. Each of the micro-particles is in the form of a micromatrix of an active ingredient uniformly distributed in at least one non-toxic polymer. The micro-particles have a predetermined release of active ingredient when the dissolution rate thereof is measured according to the Paddle Method of U.S. Pharmacopoeia XX at 37° C. and 75 r.p.m.Field of SearchNatural or synthetic resinSynthetic polymer Acrylic acid and derivatives Polysaccharides (e.g., cellulose, etc.) Contains solid synthetic resin Contains waxes, higher fatty acids, higher fatty alcohols Containing solid synthetic polymers CONTAINING DESIGNATED INGREDIENT TO REDUCE NOXIOUS EFFECTS OF ACTIVE INGREDIENT (E.G., TASTE MASKING, ODOR REDUCING, ETC.) | |
