发明授权
- 专利标题： Photographic material containing filter dyes
- 专利标题（中）： 摄影材料包含过滤器
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申请号： US3723128D申请日： 1971-06-02
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公开(公告)号： US3723128A公开(公告)日： 1973-03-27
- 发明人: MAC DONALD E , CAMPBELL F
- 申请人： ILFORD LTD
- 专利权人： Ilford Ltd
- 当前专利权人： Ilford Ltd
- 优先权： GB2684170 1970-06-03
- 主分类号： C09B23/06
- IPC分类号： C09B23/06 ; G03C1/83 ; G03C1/84
摘要：
This invention relates to new polymethinoxanol dye-stuffs. They correspond to the formula
WHEREIN X is the residue of a heterocyclic ring system and R1 and R2 are hydrogen atoms or optionally substituted alkyl or aryl groups. They are useful for incorporation in photographic silver halide material and able to correct various deficiencies of such material.
WHEREIN X is the residue of a heterocyclic ring system and R1 and R2 are hydrogen atoms or optionally substituted alkyl or aryl groups. They are useful for incorporation in photographic silver halide material and able to correct various deficiencies of such material.
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