Black and white photographic element
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United States of America Patent
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Jul 27, 1999
Grant Date -
N/A
app pub date -
Jul 31, 1996
filing date -
Jul 31, 1996
priority date (Note) -
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Abstract
A black and white photographic element contains a filter dye of Formula (I): ##STR1## wherein each R.sup.1 is independently substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, cyano, hydroxy, carboxy, substituted or unsubstituted amido, or substituted or unsubstituted sulfonamido; n is 1-4; R.sup.2 is H, substituted or unsubstituted alkyl or amido; each of R.sup.3 and R.sup.4 is independently hydrogen or substituted or unsubstituted alkyl; and M is a cation.
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