Sustained release compositions
US4849415A · kind A · utility
8Cited by
14References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1985 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Jan 11, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q13/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compositions capable of the sustained release of active organic agents are made from an aqueous dispersion of a water-insoluble cellulose ether which cellulose ether particles have reversibly diffused therein the active agent. The dispersions may be used as dispersions, dewatered to form a powder, or coalesced to form films or other articles all of which are capable of sustained release of the active agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.