Supersensitized silver halide photographic emulsions

Claim 2

A SILVER HALIDE PHOTOGRAPHIC EMULSION COMPRISING A SUPERSENSITIZING AMOUNT OF AT LEAST ONE BENZIMIDAZOLO.OXACARBOCYANINE DYE REPRESENTED BY GENERAL FORMULA (1)

Claim 3

The silver halide photographic emulsion as set forth in claim 1 wherein the halogen atom is chlorine, bromine, fluorine or iodine; the alkoxy group is methoxy or ethoxy; the amino group is an amino group, methylamino or dimethylamino; the acylamide group is an acetoamide group; the acyloxyl group is an acetoxy group; the carboalkoxy group is an carboethoxy group; the alkoxycarbonyl amino group is an ethoxycarbonyl amino group; the alkoxycarbonyl group is a methoxycarbonyl or ethoxycarbonyl group; the alkylsulfonyl group is a methylsulfonyl group; the alkylaminosulfonyl group is ethylaminosulfonyl or diethylaminosulfonyl in each of A1 or A2; and wherein the alkyl group is methyl, ethyl group, n-propyl, vinylmethyl, hydroxyalkyl, acetoxyalkyl, alkoxyalkyl, alkyl having a carboxy group, alkyl having a sulfo group or aralkyl in each of R, R1 and R2, or R3 and R4.

Claim 4

The silver halide photographic emulsion as set forth in claim 2 wherein the hydroxy alkyl group is 2-hydroxyethyl or 4-hydroxybutyl; the acetoxy alkyl group is 2-acetoxyethyl or 3-acetoxypropyl; the alkoxyalkyl group is 2-methoxyethyl or 4-butoxybutyl; the alkyl group having a carboxy group is 2-carboxyethyl, 3-carboxypropyl, 2-(2-carboxyethoxy)ethyl or p-carboxybenzyl; the alkyl group having a sulfo group is 2-sulfoethyl, 3-sulfopropyl, 3-sulfobutyl, 4-sulfobutyl, 2-hydroxy-3-sulfopropyl, 2-(3-sulfopropoxy)ethyl, 2-acetoxy-3-sulfopropyl, 3-methoxy-2-(3-sulfopropoxy)propyl, 2-(2-sulfopropoxy)ethoxy) ethyl, 2-hydroxy-3-(3-sulfopropoxy)propyl, sulfophenethyl or p-sulfobenzyl; and the aralkyl group is benzyl or phenethyl.

Claim 5

The silver halide photographic emulsion as set forth in claim 1 wherein a binder of the emulsion comprises gelatin.

Claim 6

The silver halide photographic emulsion as set forth in claim 1 wherein the ratio by weight of dye (I) to dye (II) is in the range of from about 9/1 to about 1/9.

Claim 7

The silver halide photographic emulsion as set forth in claim 1 wherein the amount of the sensitizing dye added to the emulsion iS in the range of from about 1 X 10 6 to about 5 X 10 3 moles per gram-mole of silver halide in the emulsion.

Claim 8

The silver halide photographic emulsion as set forth in claim 1 wherein the silver halide is silver chlorobromide or silver chlorobromoiodide.

Claim 9

The silver halide photographic emulsion as set forth in claim 7 wherein the silver halide is silver chlorobromide.

Claim 10

The silver halide photographic emulsion as set forth in claim 8 wherein said silver halide emulsion further contains an iodide in an amount of 0.005-0.10 mole and/or a bromide in an amount of 0.01-0.20 mol respectively, per mole of silver chloride constituting the silver halide.

Claim 11

The silver halide photographic emulsion as set forth in claim 1 wherein said silver halide photographic emulsion contains a color coupler.

Claim 12

The silver halide photographic emulsion as set forth in claim 10 wherein the color coupler is a magenta coupler.

Claim 13

The silver halide photographic emulsion as set forth in claim 1 wherein said halide photographic emulsion contains a light absorbing dye.

Claim 14

The silver halide photographic emulsion as set forth in claim 1 wherein said benzimidazolo.oxacarbocyanine dye represented by general formula (I) is substituted by a halogen atom in at least one of the 5- or 6-positions of the benzimidazole nucleus thereof.

Claim 15

The silver halide photographic emulsion as set forth in claim 1 wherein said oxacarbocyanine dye represented by general formula (II) is substituted by a halogen atom at the 5-position of the benzoxazole nucleus thereof.

Claim 16

A color photographic light-sensitive element comprising a support having thereon a layer of the silver halide photographic emulsion as set forth in claim 10.

Claim 17

The silver halide photographic emulsion as set forth in claim 1 wherein the oxazole ring of the benzimidazolo.oxacarbocyanine represented by general formula (I) is a Beta -naphthooxazole ring, an Alpha -naphthooxazole ring or a Beta , Beta -napthoxazole ring.

Claim 18

A silver halide photographic emulsion containing a supersensitizing amount of the combination selected from the group of

Claim 19

A silver halide photographic emulsion containing a supersensitizing amount of the combination selected from the group of