US3957491A
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US
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Silver halide photographic material containing an organic compound having a covalent nitrogen-halogen bond as sensitizer
Assignee: Fujifilm Holdings Corp
•
Filing: 1973-09-04
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Granted: 1976-05-18
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Expires: 1993-09-04
Abstract
Abstract A silver halide photographic material having improved sensitivity unaccompanied by an increase in fog formation containing, in a photographic layer thereof, an organic compound having a nitrogen-halogen bond in the molecule.
Inventors
- 👤 Reiichi Ohi
- 👤 Keiichi Adachi
- 👤 Norihiko Katoh
- 👤 Kimitaka Kameoka
- 👤 Mitsunori Sugiyama
- 👤 Toshiaki Aono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:02
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/08; G03C1/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
143 words
A silver halide photographic emulsion containing an organic compound having a covalent nitrogen-halogen bond, said organic compound is represented by the general formula (I) wherein X represents a halogen atom; A represents a hydrogen atom, an alkali metal atom, a R--CO-- group, or a R--SO 2 -- group; B represents a R'--CO-- group, a R'--SO 2 -- group, or R'; and R and R' each represents a non-metallic atomic group selected from the class consisting of an alkyl group having 1-8 carbon atoms, a phenyl group, a naphthyl group or a pyridine group; said R and R' may combine to form a heterocyclic ring of the general formula ##EQU4## wherein Y represents the non-metallic atoms necessary to form a 5-, 6-, or 7-membered ring with said ##EQU5## moiety, said organic compound being present in an amount sufficient to increase photosensitivity without increasing fog.
Claim 2
Dependent Claim
143 words
A silver halide photographic emulsion containing an organic compound having a covalent nitrogen-halogen bond, said organic compound is represented by the general formula (I) wherein X represents a halogen atom; A represents a hydrogen atom, an alkali metal atom, a R--CO-- group, or a R--SO 2 -- group; B represents a R'--CO-- group, a R'--SO 2 -- group, or R'; and R and R' each represents a non-metallic atomic group selected from the class consisting of an alkyl group having 1-8 carbon atoms, a phenyl group, a naphthyl group or a pyridine group; said R and R' may combine to form a heterocyclic ring of the general formula ##EQU4## wherein Y represents the non-metallic atoms necessary to form a 5-, 6-, or 7-membered ring with said ##EQU5## moiety, said organic compound being present in an amount sufficient to increase photosensitivity without increasing fog.
Claim 3
Dependent Claim
23 words
The silver halide photographic emulsion as set forth in claim 1, wherein said organic compound having a nitrogen-halogen bond is ##SPC7## ##SPC8## ##SPC9##
Claim 4
Dependent Claim
18 words
The silver halide photographic emulsions as set forth in claim 1, wherein said emulsion contain a gold sensitizer.
Claim 5
Dependent Claim
65 words
The silver halide photographic emulsion as set forth in claim 1, in which said organic compound having a covalent nitrogen-halogen bond is incorporated in the silver halide emulsion during the chemical ripening of the silver halide emulsion in an amount of 1 mg to 1 g per mol of silver halide in said silver halide emulsion and further wherein said emulsion contains a gold sensitizer.
Claim 6
Dependent Claim
33 words
The silver halide photographic emulsion as set forth in claim 4, wherein the non-metallic atoms necessary to form said 5-, 6- or 7-membered ring are selected from C, N, O, S and Se.
Claim 7
Dependent Claim
36 words
The silver halide photographic emulsion as set forth in claim 5, wherein said 5-, 6- or 7-membered ring is selected from the group consisting of phthalimide, succinimide, maleimide, caprolactam, hydantoin, barbituric acid, cyanuric acid and saccharin.
Claim 8
Dependent Claim
154 words
A silver halide photographic material comprising a support having thereon a photographic layer containing an organic compound having a covalent nitrogen-halogen bond in the molecule, said organic compound is represented by the general formula (I) wherein X represents a halogen atom; A represents a hydrogen atom, an alkali metal atom, a R--CO-- group or a R--SO 2 -- group; B represents a R'--CO-- group, a R'--SO 2 -- group, or R'; and R and R' each represents a non-metallic atomic group selected from the class consisting of an alkyl group having 1-8 carbon atoms, a phenyl group, a naphthyl group or a pyridine group, said R and R' may combine to form a heterocyclic ring of the general formula ##EQU6## wherein Y represents the non-metallic atoms necessary to form a 5-, 6-, or 7-membered ring with said ##EQU7## moiety, said organic compound being present in an amount sufficient to increase photosensitivity without increasing fog.
Claim 9
Dependent Claim
154 words
A silver halide photographic material comprising a support having thereon a photographic layer containing an organic compound having a covalent nitrogen-halogen bond in the molecule, said organic compound is represented by the general formula (I) wherein X represents a halogen atom; A represents a hydrogen atom, an alkali metal atom, a R--CO-- group or a R--SO 2 -- group; B represents a R'--CO-- group, a R'--SO 2 -- group, or R'; and R and R' each represents a non-metallic atomic group selected from the class consisting of an alkyl group having 1-8 carbon atoms, a phenyl group, a naphthyl group or a pyridine group, said R and R' may combine to form a heterocyclic ring of the general formula ##EQU6## wherein Y represents the non-metallic atoms necessary to form a 5-, 6-, or 7-membered ring with said ##EQU7## moiety, said organic compound being present in an amount sufficient to increase photosensitivity without increasing fog.
Claim 10
Dependent Claim
31 words
The silver halide photographic material as set forth in claim 7, in which said photographic layer containing said organic compound having a covalent nitrogen-halogen bond is a silver halide emulsion layer.
Claim 11
Dependent Claim
38 words
The silver halide photographic material as set forth in claim 8, in which said covalent organic compound having a nitrogen-halogen bond is incorporated in the silver halide emulsion layer during the chemical ripening of the silver halide emulsion.
Claim 12
Dependent Claim
40 words
The silver halide photographic material as set forth in claim 8, in which the amount of said organic compound having a covalent nitrogen-halogen bond is 1 mg to 1 g per mol of silver halide in said silver halide emulsion.
Claim 13
Dependent Claim
22 words
The silver halide photographic material as set forth in claim 7, wherein said organic compound having a nitrogen-halogen bond is ##SPC10## ##SPC11##
Claim 14
Dependent Claim
18 words
The silver halide photographic material as set forth in claim 8, wherein said emulsion contains a gold sensitizer.
Claim 15
Dependent Claim
66 words
The silver halide photographic material as set forth in claim 7, in which said organic compound having a covalent nitrogen-halogen bond is incorporated in the silver halide emulsion layer during the chemical ripening of the silver halide emulsion in an amount of 1 mg to 1 g per mol of silver halide in said silver halide emulsion and further wherein said emulsion contains a gold sensitizer.
Claim 16
Dependent Claim
33 words
The silver halide photographic material as set forth in claim 13, wherein the non-metallic atoms necessary to form said 5-, 6- or 7-membered ring are selected from C, N, O, S and Se.
Claim 17
Dependent Claim
36 words
The silver halide photographic material as set forth in claim 14, wherein aid 5-, 6- or 7-membered ring is selected from the group consisting of phthalimide, succinimide, maleimide, caprolactam, hydantoin, barbituric acid, cyanuric acid and saccharin.
Claim 18
Independent Claim
159 words
A method of chemical ripening of a silver halide photographic emulsion comprising conducting said chemical ripening in contact with an organic compound having a covalent nitrogen-halogen bond in the molecule, said organic compound is represented by the general formula (I) wherein X represents a halogen atom; A represents a hydrogen atom, an alkali metal atom, a R--CO-- group or a R--SO 2 -- group; B represents a R'--CO-- group, a R'--SO 2 -- group, or R'; and R and R' each represents a non-metallic atomic group selected from the class consisting of an alkyl group having 1-8 carbon atoms, a phenyl group, a naphthyl group or a pyridine group, said R and R' may combine to form a heterocyclic ring of the general formula ##EQU8## wherein Y represents the non-metallic atoms necessary to form a 5-, 6-, or 7-membered ring with said ##EQU9## moiety, said organic compound being present in an amount sufficient to increase photosensitivity without increasing fog.
Claim 19
Independent Claim
159 words
A method of chemical ripening of a silver halide photographic emulsion comprising conducting said chemical ripening in contact with an organic compound having a covalent nitrogen-halogen bond in the molecule, said organic compound is represented by the general formula (I) wherein X represents a halogen atom; A represents a hydrogen atom, an alkali metal atom, a R--CO-- group or a R--SO 2 -- group; B represents a R'--CO-- group, a R'--SO 2 -- group, or R'; and R and R' each represents a non-metallic atomic group selected from the class consisting of an alkyl group having 1-8 carbon atoms, a phenyl group, a naphthyl group or a pyridine group, said R and R' may combine to form a heterocyclic ring of the general formula ##EQU8## wherein Y represents the non-metallic atoms necessary to form a 5-, 6-, or 7-membered ring with said ##EQU9## moiety, said organic compound being present in an amount sufficient to increase photosensitivity without increasing fog.
Claim 20
Independent Claim
18 words
The method of chemical ripening as set forth in clam 16, wherein said emulsion contain a gold sensitizer.
Claim 21
Independent Claim
18 words
The method of chemical ripening as set forth in clam 16, wherein said emulsion contain a gold sensitizer.
Claim 22
Dependent Claim
65 words
The method of chemical ripening as set forth in claim 7, in which said organic compound having a covalent nitrogen-halogen bond is incorporated in the silver halide emulsion during the chemical ripening of the silver halide emulsion in an amount of 1 mg to 1 g per mol of silver halide in said silver halide emulsion and further wherein said emulsion contains a gold sensitizer.
Claim 23
Dependent Claim
33 words
The method of chemical ripening as set forth in claim 18, wherein the non-metallic atoms necessary to form said 5-, 6- or 7-membered ring are selected from C, N, O, S and Se.
Claim 24
Dependent Claim
36 words
The method of chemical ripening as set forth in claim 19, wherein said 5-, 6- or 7-membered ring is selected from the group consisting of phthalimide, succinimide, maleimide, caprolactam, hydantoin, barbituric acid, cyanuric acid and saccharin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |