Multilayer photochromic articles
US10423061B2 · kind B2 · utility
2Cited by
61References
23Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 3, 2015 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Sep 3, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multilayer photochromic article can include a photochromic substrate, which may include a first photochromic layer defining a surface of the substrate, and a second photochromic layer positioned between the surface of the photochromic substrate and a source of actinic radiation, and in which the photochromic substrate and the second photochromic layer are selected such that the fade half-life of the photochromic substrate or the half-life of the first photochromic layer defining the surface of the substrate are greater than the fade half-life of the second photochromic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.