Erodible agent releasing device comprising poly(orthoesters) and poly(orthocarbonates)
US4138344A · kind A · utility
151Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Aug 24, 1997 |
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.