发明名称 |
Direct positive dimethine cyanine dyes containing 1-aryl-2-heteroaryl indole nucleus |
摘要 |
Compounds as defined having a 1-phenylindole nucleus substituted in the 2-position with a 3-pyridyl group. Such compounds are useful in the preparation of cyanine dyes which can be used to sensitize silver halide emulsions for fogged direct-positive films.
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申请公布号 |
US5004812(A) |
申请公布日期 |
1991.04.02 |
申请号 |
US19900479484 |
申请日期 |
1990.01.22 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
WEAVER, THOMAS D. |
分类号 |
C09B23/10;G03C1/485 |
主分类号 |
C09B23/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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