Low N-vinyl lactam content based biomedical devices
US4440919A · kind A · utility
9Cited by
1References
21Claims
0Family size
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Inventors
Key dates
| Filing date | Nov 12, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Nov 12, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F226/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Low N-vinyl lactam content copolymers are cross-linked with resonance free di(alkene tertiary amine) cyclic compounds to obtain biomedical devices, including soft contact lenses, which have good oxygen permeability and mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.