Tinted contact lenses and a method for their preparation with reactive dyes
US4468229A · kind A · utility
67Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1982 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Jun 1, 2002 |
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 ether 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.