Tinted contact lenses and a method for their preparation
US4553975A · kind A · utility
50Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1984 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Feb 15, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Contact lenses comprising polymeric lens materials in which reactive dyestuffs have been covalently bonded to monomer units of the polymer backbone, said reactive dyestuffs being reactive dyes capable of forming either linkages with cellulose and reactive with hydroxyl, amino, amido or mercapto groups present in a hydrogel polymer to form the covalent bond therewith. The invention is of particular interest in the area of so-called hydrophilic or "soft" contact lenses, commonly referred to as hydrogel lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.