Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
May 19, 2015
Patent Application Number
13313178
Date Filed
December 7, 2011
Patent Citations Received
Patent Primary Examiner
Patent abstract
Described herein are compounds generally comprising an indeno[2′,3′:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles. Also described herein are methods for preparing certain photochromic compounds, compositions, and articles.
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