发明授权
US5641613A Photographic element containing an azopyrazolone masking coupler
exhibiting improved keeping
失效
含有氮杂吡唑酮掩蔽偶合剂的照相元件显示出改进的保持性
- 专利标题： Photographic element containing an azopyrazolone masking coupler exhibiting improved keeping
- 专利标题（中）： 含有氮杂吡唑酮掩蔽偶合剂的照相元件显示出改进的保持性
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申请号： US591122申请日： 1996-01-25
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公开(公告)号： US5641613A公开(公告)日： 1997-06-24
- 发明人: Jane Sarah Boff , Stephen Paul Singer
- 申请人： Jane Sarah Boff , Stephen Paul Singer
- 申请人地址： NY Rochester
- 专利权人： Eastman Kodak Company
- 当前专利权人： Eastman Kodak Company
- 当前专利权人地址： NY Rochester
- 主分类号： G03C7/00
- IPC分类号： G03C7/00 ; G03C7/305 ; G03C7/32 ; G03C7/333 ; G03C7/38 ; G03C7/384
摘要：
The invention provides a photographic element comprising a support bearing a light-sensitive photographic silver halide layer containing (1) a bicyclic azole coupler (2) an azopyrazolone masking coupler and (3) a low impact development inhibitor releasing (LIDIR) coupler having at least one hydrogen atom at the coupling site and which does not substantially reduce contrast in the layer in which it is coated.
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