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Patent Searching and Data


Title:
(BENZOFURAN)NAPHTHOPYRANS, THE COMPOSITIONS AND (CO)POLYMER MATRICES CONTAINING THEM
Document Type and Number:
WIPO Patent Application WO1998028289
Kind Code:
A8
Abstract:
The present invention has for subjects novel compounds of the (benzofuran)naphthopyran type as well as the compositions and (co)polymer matrices containing them. Said compounds possess interesting photochromic properties.

Inventors:
CHAN YOU-PING
Application Number:
PCT/US1997/020607
Publication Date:
August 26, 1999
Filing Date:
December 10, 1997
Export Citation:
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Assignee:
CORNING INC (US)
International Classes:
G02C7/10; C07D493/04; C08F246/00; C08K5/00; C08K5/1545; C09K9/02; G02B5/23; G03C1/73; (IPC1-7): C07D311/78; C07D207/323; C07D307/94
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