Appeal No. 2007-0218
Application No. 10/730,143
wherein R21 and R21' each independently represent a methyl group or an
alkyl group having 2 to 20 carbon atoms, in which a carbon atom bonding to
the benzene ring is primary; R22 and R22' each independently represent an
alkyl group having 1 to 20 carbon atoms; L represents an -S- group or a
-CHR23- group, in which R23 represents a hydrogen atom or an alkyl group
having 1 to 20 carbon atoms; and X21 and X21' each independently represent
a hydrogen atom or a group capable of being substituted on the benzene
ring.
2. The photothermographic material of claim 1, further comprising a
compound represented by the following formula (H):
Formula (H)
Q-(Y)n-C(Z1)(Z2)X
wherein Q represents an alkyl group, an aryl group, or a heterocyclic group;
Y represents a divalent connecting group; n represents 0 or 1; Z1 and Z2 each
represent a halogen atom; and X represents a hydrogen atom or an electron
withdrawing group.
Thus, claim 1 is directed to a photothermographic material comprising
a photosensitive silver halide, a non-photosensitive organic silver salt, a
reducing agent, and a binder on a surface of a support. The photosensitive
silver halide contains 40-100 mole % silver iodide and the reducing agent
includes two compounds, a compound of formula (R-1) and a compound of
either formula (R-2) or formula (R-3).
Claim 2 depends from claim 1 and recites that the photothermographic
material also comprises a compound represented by formula (H).
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