Invention Grant
- Patent Title: Optical article with gradient photochromism
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Application No.: US15023086Application Date: 2014-09-19
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Publication No.: US09678363B2Publication Date: 2017-06-13
- Inventor: Ker Chin Dave Ang , Andrew Pelayo , Francisco De Ayguavives
- Applicant: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Applicant Address: FR Charenton-le-Pont
- Assignee: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Current Assignee: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
- Current Assignee Address: FR Charenton-le-Pont
- Agency: Norton Rose Fulbright US LLP
- Priority: EP13306288 20130920
- International Application: PCT/EP2014/070040 WO 20140919
- International Announcement: WO2015/040184 WO 20150326
- Main IPC: G02C7/10
- IPC: G02C7/10 ; G02B1/11 ; G02B1/115 ; G02B5/28 ; C23C14/24 ; G02B1/111
Abstract:
The present invention is drawn to an optical article comprising: (a) a photochromic substrate comprising at least one photochromic dye, and (b) an interference coating having a specific gradient thickness providing for a gradient reflectance. It also pertains to a process for making such an optical article.
Public/Granted literature
- US20160231594A1 OPTICAL ARTICLE WITH GRADIENT PHOTOCHROMISM Public/Granted day:2016-08-11
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