Polymers containing acetal, carboxy-acetal, ortho ester and carboxyortho ester linkages
US4957998A · kind A · utility
51Cited by
8References
39Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 22, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Aug 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/672
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Biodegradable polymers that are useful for making biodegradable sustained release agent dispensers and which contain acetal, carboxy-acetal, ortho ester and/or carboxy-ortho ester linkages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.