Squarylium compounds and optical recording medium containing the same
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United States of America Patent
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Jul 22, 2003
Grant Date -
May 1, 2003
app pub date -
Dec 5, 2001
filing date -
Dec 16, 1999
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Expired
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Abstract
Squarylium compounds having spectroscopic properties, light resistance, solubility and thermal decomposition properties suitable for a recording material for DVD-R represented by the general formula (I), having pyrazole and indoline skeletons in the molecule and optical recording media having a recording layer comprising an asymmetric squarylium compound of formula (I). ##STR1##
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