Invention Grant
US5609996A Photographic emulsion layer containing pyrazoloazole coupler exhibiting
improved dye light fade
失效
含有吡唑并唑成色剂的摄影乳剂层显示改善的染料光褪色
- Patent Title: Photographic emulsion layer containing pyrazoloazole coupler exhibiting improved dye light fade
- Patent Title (中): 含有吡唑并唑成色剂的摄影乳剂层显示改善的染料光褪色
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Application No.: US608916Application Date: 1996-02-29
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Publication No.: US5609996APublication Date: 1997-03-11
- Inventor: Ping W. Tang , Stanley W. Cowan , David J. Decker , Terrence C. Mungal
- Applicant: Ping W. Tang , Stanley W. Cowan , David J. Decker , Terrence C. Mungal
- Applicant Address: NY Rochester
- Assignee: Eastman Kodak Company
- Current Assignee: Eastman Kodak Company
- Current Assignee Address: NY Rochester
- Main IPC: C07D487/04
- IPC: C07D487/04 ; G03C7/38
Abstract:
A photographic light sensitive silver halide emulsion layer has associated therewith a pyrazoloazole dye-forming coupler having the formula: ##STR1## wherein: R.sup.1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom;X is hydrogen or a coupling-off group;L is a divalent linking group;R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen or substituent groups; andZ.sub.a, Z.sub.b, and Z.sub.c are independently --C(R')(R")--, .dbd.N--, .dbd.C(R')--, or --NH--, wherein R', and R" are independently H or a substituent, provided that one of either the Z.sub.a --Z.sub.b or the Z.sub.b --Z.sub.c bond is a double bond and the other is a single bond, and provided that when the Z.sub.b --Z.sub.c bond is a double bond, it may form part of a fused ring.
Public/Granted literature
- US4560287A Safety case for the medical glass thermometer Public/Granted day:1985-12-24
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