Sustained-release preparation utilizing thermal change and process for the production thereof
US6238704A · kind A · utility
37Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Feb 22, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5078
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A sustained-release preparation which can release a highly water-soluble medicinally active ingredient over a long time and a process for the production thereof are provided. The preparation has a sustained-releasing layer formed by heating and melting a layer composed of both an aqueous ethylcellulose latex containing a plasticizer and a wax to miscibilize them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.