Photochromic optical article
US7811480B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2004 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jan 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Describes a photochromic article, e.g., an ophthalmic photochromic plastic article, such as a lens, in which the article includes (1) a rigid substrate, e.g., polymeric substrate, such as a thermoset or thermoplastic substrate, (2) a photochromic polymeric coating appended to at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one photochromic material, e.g., spirooxazine, naphthopyran and/or fulgide, and (3) a film comprising a maleimide derivative coherently appended to the photochromic coating. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the maleimide derivative-containing film, e.g., an abrasion-resistant coating comprising an organo silane; and describes further a photochromic article having an antireflective coating affixed to the abrasion-resistant coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.