CHROMENE COMPOUND
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United States of America Patent
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Issued Date -
Jan 30, 2014
app pub date -
Jan 25, 2012
filing date -
Jan 27, 2011
priority date (Note) -
Abandoned
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Abstract
A chromene compound which develops a color of a neutral tint and has high color optical density, high fading speed and excellent durability and a photochromic curable composition comprising the chromene compound and polymerizable monomers.
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