Invention Grant
- Patent Title: Photochromic benzopyrano-benzopyrans with further fusing
- Patent Title (中): 光致变色苯并吡喃 - 苯并吡喃与进一步融合
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Application No.: US12672589Application Date: 2008-08-08
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Publication No.: US08236716B2Publication Date: 2012-08-07
- Inventor: Manfred Melzig , Yven Rohlfing , Udo Weigand
- Applicant: Manfred Melzig , Yven Rohlfing , Udo Weigand
- Applicant Address: DE Munich
- Assignee: Rodenstock GmbH
- Current Assignee: Rodenstock GmbH
- Current Assignee Address: DE Munich
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: DE102007039994 20070823
- International Application: PCT/EP2008/006575 WO 20080808
- International Announcement: WO2009/024271 WO 20090226
- Main IPC: C03C4/00
- IPC: C03C4/00 ; G02B5/23
Abstract:
The present invention relates to photochromic benzopyranobenzopyrans with additional fusion and to the use thereof in plastics of all types, in particular for ophthalmic purposes. The compounds according to the invention are photochromic benzopyran compounds which can also be regarded as derived from 9-oxa-9,10-dihydrophenanthrene.
Public/Granted literature
- US20110201489A1 PHOTOCHROMIC BENZOPYRANO-BENZOPYRANS WITH FURTHER FUSING Public/Granted day:2011-08-18
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