Invention Grant
- Patent Title: Photochromic multiple ring-fused naphthopyrans having extreme longwave absorption extending far into the visible wavelength range
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Application No.: US16336185Application Date: 2017-05-23
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Publication No.: US10647852B2Publication Date: 2020-05-12
- Inventor: Udo Weigand , Herbert Zinner
- Applicant: RODENSTOCK GMBH
- Applicant Address: DE
- Assignee: RODENSTOCK GMBH
- Current Assignee: RODENSTOCK GMBH
- Current Assignee Address: DE
- Agency: McDonald Hopkins LLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@1758e34
- International Application: PCT/EP2017/000617 WO 20170523
- International Announcement: WO2018/054507 WO 20180329
- Main IPC: C09B57/00
- IPC: C09B57/00 ; G02B1/04 ; G02B5/23 ; C07D293/04 ; C07D493/14 ; C07D495/04 ; C07D493/04
Abstract:
The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.
Public/Granted literature
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