Electrochromic composition
US9841652B2 · kind B2 · utility
4Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2014 |
| Grant date | Dec 12, 2017 |
| Priority date | — |
| Expiry date | Jan 11, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1502
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to an electrochromic composition comprising at least one reducing compound, at least one oxidizing compound which is selected from specific viologen derivatives, and at least one dye. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.