Controlled release tablet
US5945125A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1996 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jun 21, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2054
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A controlled release tablet including a pharmaceutical agent and an excipient. The excipient includes at least about 60% of a water swellable polymer and a lubricant. The water swellable polymer is chosen such that the swelling rate of the polymer is equal to the dissolution rate of the swollen polymer. The excipient may also include such other ingredients as diluents, fillers, binders, solubilizers, emulsifiers, and other pharmacologically inactive compounds. The polymer is chosen with the pharmaceutical agent in mind such that the tablet will be fully dissolved at the same time that the last of the pharmaceutical agent is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.