Rigid, gas-permeable polysiloxane contact lenses
US4923906A · kind A · utility
13Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1989 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Apr 26, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New polysiloxane contact lenses are described which are prepared from polysiloxanes bearing at least three polymerizable vinyl groups by copolymerization with acrylic comonomers. The new lens materials are characterized by a superior combination of high oxygen permeability and rigidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.