Drug delivery devices manufactured from poly(orthoesters) and poly(orthocarbonates)
US4093709A · kind A · utility
394Cited by
4References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1975 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Jan 28, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S71/904
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns orthoester and orthocarbonate polymers having a repeating mer comprising a hydrocarbon radical and a symmetrical dioxycarbon unit of the general formula: ##STR1## WHEREIN R.sub.1 is a multivalent hydrocarbon radical, R.sub.2 and R.sub.3 are hydrocarbon radicals with at least one of R.sub.2 or R.sub.3 bonded to the dioxycarbon through an oxygen linkage, and which polymers are synthesized by reacting a polyol with an orthoester or orthocarbonate. The polymers are useful for making articles of manufacture, including devices and coatings for delivering beneficial agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.