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| Number | Title | Issue Date |
| 5055306 | Sustained-release formulations A granular sustained-release formulation of a pharmacologically active substance presented in the form of a tablet, said tablet comprising sufficient granules to provide a predetermined dose or number of doses of the pharmacologically active substance and... | 10/08/1991 |
| 4900558 | Sustained release ibuprofen formulation including a core of ibuprofen and a microcrystalline cellulose and a covering of acrylic polymer and hydroxylated cellulose derivative The present invention provides a sustained release methyl-4-(2-methylpropyl)benzene acetic acid (Ibuprofen) formulation comprising sufficient granules to provide a predetermined dose or number of doses of Ibuprofen, each granule having a diameter b... | 02/13/1990 |
