Dye-forming coupler, silver halide photographic...

Details Dye-forming coupler, silver halide photographic... Dye-forming coupler, silver halide photographic...

2007-03-20

2007-03-20

Powers, Fiona T. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C544S249000, C544S253000, C544S256000, C544S278000, C544S280000, C544S284000, C544S287000

Reexamination Certificate

active

10679495

ABSTRACT:
A dye-forming coupler and compound of formula (I):wherein Q represents a residue that forms, together with —N—C═N—, a nitrogen-containing 6-membered ring; RArepresents an aryl, heterocyclic, or —(R1)r—(R4)mgroup; X represents an aryl group; Y represents a hydrogen atom, or a group capable of being split-off upon a coupling reaction with an oxidized product of a developing agent:wherein,when RArepresents an —(R1)r—(R4)mgroup, R1represents a methylene group, a methine group, or a carbon atom; r is 1 to 30; R4represents a substituent except for a hydrogen atom; m is 1 to 30; and the —(R1)r—(R4)mgroup does not represent a straight-chain alkyl group.

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