Silver handle emulsion and silver halide photographic lightsensitive material
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United States of America Patent
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Feb 10, 2004
Grant Date -
Nov 6, 2003
app pub date -
Jul 30, 2002
filing date -
Aug 1, 2001
priority date (Note) -
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Abstract
A silver halide emulsion comprises an electron-releasing compound of Types 1 to 4: (Type 1) a compound capable of undergoing a one-electron oxidation (1-EO) to form a one-electron oxidation product (1-EOP), the 1-EOP capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction, (Type 2) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and having, in its molecule, two or more adsorptive groups acting on silver halides, (Type 3) a compound capable of undergoing 1-EO to thereby form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent bond forming process, and (Type 4) a compound capable of undergoing 1-EO to form 1-EOP, the 1-EOP capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction.
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