Electrochromic compounds and optical articles containing them
US10563120B2 · kind B2 · utility
1Cited by
0References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2016 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Jul 6, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Electrochromic compounds and optical articles containing them The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds 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.