Tablets with controlled-rate release of active substances
US5422123A · kind A · utility
192Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1993 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | Sep 21, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2086
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Tablets with zero order controlled-rate of release of the active substances, consisting of a core of defined geometrical form containing the active substance, polymer substances which swell on contact with aqueous liquids and polymer substances with gelling properties, and a support applied to said core to partly cover its surface, the support consisting of polymer substances which are slowly soluble and/or slowly gellable in aqueous liquids, plasticizing substances, and possibly substances with an adjuvant function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.