Compounds that absorb ultraviolet light, methods of their preparation and optical lenses containing them
US7713452B2 · kind B2 · utility
16Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2005 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Mar 7, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/353
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds that absorb ultraviolet light 380 nm to 400 nm range but avoid absorption in the blue light range, thereby imparting yellowness, i.e., 410-420 nm have suitable refractive characteristics useful in the preparation of optical resins or plastics suitable, for example, for the manufacture of ophthalmic lenses. Methods for making the compounds, optic lenses containing the compounds, and methods for making these are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.