OPTICAL FILTER
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United States of America Patent
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Issued Date -
Mar 19, 2009
app pub date -
Nov 18, 2005
filing date -
Nov 19, 2004
priority date (Note) -
Abandoned
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Abstract
The present invention provides optical filters comprising a squarylium compound represented by General Formula (I):represents a hydrogen atom or an alkyl group optionally having substituent(s), and Y represents a group represented by General Formula (A):may be the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group optionally having substituent(s) or the like)] and the like.
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