Sustained release pharmaceutical compositions in oral dosage form
US4919938A · kind A · utility
18Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P25/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Oral dosage forms for neutral, zwitterions or slats of acidic or basic drugs with approximate zero order release kinetics comprise a core matrix of the drug, and a gelling polymer, the matrix being coated with a water permeable but insoluble polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.