Polymeric drug delivery system
US5827925A · kind A · utility
32Cited by
3References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1993 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Nov 2, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/923
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A drug delivery system adapted to release an effective amount of a drug at pH values of about 1 to 7 without releasing a significant amount of the drug at pH values of about 7 and above, the system comprising a polymeric material and a drug covalently bonded to the polymeric material through a pH sensitive covalent bond capable of being cleaved in the pH range of 1 to about 7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.