Silver halide supersensitized photographic emulsion

Claim 2

A silver halide emulsion according to claim 1 wherein the alkyl group of R1 to R6 is methyl, ethyl, n-propyl, iso-propyl, n-butyl or iso-butyl.

Claim 3

A silver halide emulsion according to claim 2 wherein the alkyl group of R1 to R7 is methyl, ethyl, n-propyl, iso-propyl, n-butyl or iso-butyl.

Claim 4

A silver halide emulsion according to claim 1 wherein said substituted alkyl group is a vinylmethyl group, a benzyl group, a Beta -acetoxyethyl group, a gamma -acetoxypropyl group, a gamma -carboxypropyl group, a Beta -carboxyethyl group, a gamma -sulfatopropyl group, a delta -sulfatobutyl group, a delta -N-acetylsulfamylbutyl group, a Beta -hydroxyethyl group, a gamma -sulfopropyl group, a gamma -sulfobutyl group, a delta -sulfobutyl group, a 2-(3-sulfopropoxy)ethyl group, a 2(2-(3-sulfopropoxy)ethoxy)ethyl group, or a 2-hydroxy-1-sulfopropyl group.

Claim 5

A silver halide emulsion according to claim 1 wherein the heterocyclic nucleus of the benzimidazole series completed by Z1, Z2 or Z5 is a benzimidazole nucleus, or a benzimidazole nucleus containing, as a component of the skeletal-structure thereof, a benzene ring substituted by at least one of the groups consisting of a halogen atom, an N-unsubstituted or alkyl substituted sulfamyl or carbamyl group, an N-disubstituted sulfamyl group, an alkyl sulfonyl group, a trifluoromethyl group, an alkyl group, a cyano group, a phenyl group, a carboalkoxyl group, a hydroxyl group and an alkoxyl group.

Claim 6

A silver halide emulsion according to claim 1 wherein the heterocyclic nucleus of the 2-quinoline series is a 2-quinoline nucleus or a 2-quinoline nucleus containing, as a component of the skeletal-structure thereof, a benzene ring substituted by at least one of the groups consisting of an alkyl group and a Halogen atom.

Claim 7

A silver halide emulsion as in claim 1 wherein the light-sensitivity in the wave length region of 500-530 m Mu is increased.

Claim 8

A silver halide emulsion as in claim 2 wherein the total amount of said sensitizing dyes I and II and said compound of formula III is within the range of from 1 X 10 6 mol to 1 X 10 3 mol per mol of silver halide.

Claim 9

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 10

A silver halide emulsion as in claim 1 wherein said emulsion contains one sensitizing dye of formula I and a sensitizing dye of the following formula:

Claim 11

A silver halide emulsion according to claim 11 wherein said sensitizing dye of formula I is:

Claim 12

A silver halide emulsion according to claim 11 wherein said sensitizing dye of formula I is

Claim 13

A silver halide emulsion as in claim 1 which contains the sensitizing dye of the following formula:

Claim 14

A silver halide emulsion according to claim 14 wherein said emulsion contains the following sensitizing dyes:

Claim 15

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 16

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 17

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 18

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 19

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 20

A silver halide emulsion as in claim 1 wherein said emulsion contains the following sensitizing dyes:

Claim 21

A photographic light-sensitive element comprising a support having thereon at least one layer containing the photographic silver halide emulsion as in claim 1.