Photothermographic imaging materials and sensitisers therefor
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United States of America Patent
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Feb 28, 1995
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N/A
app pub date -
Feb 28, 1994
filing date -
Mar 16, 1993
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Abstract
A heptamethine cyanine dye in which both nitrogen atoms of the cyanine chromophore bear a carboxyalkyl substituent comprising an alkyl chain of at least five carbon atoms. The dyes are useful as sensitisers in photothermographic imaging materials.
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