US4420554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photosensitive materials
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1982-02-17
•
Granted: 1983-12-13
•
Expires: 2002-02-17
Abstract
Abstract There is disclosed a silver halide photosensitive material which contains in at least one of silver halide emulsion layers and colloid layers at least on antifoggant precursor compound represented by the general formula: <IMAGE> wherein A, Z, R1 and R2 are the same as defined previously. This photosensitive material is stabilized against overdevelopment fogging.
Inventors
- 👤 Minoru Ohashi
- 👤 Kiyoshi Futaki
- 👤 Katsuaki Iwaosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:11
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D401/00; C07D401/02; C07D401/12; C07D403/00; C07D403/02; C07D403/12; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
163 words
In a silver halide photographic photosensitive material which comprises a support and photographic layers provided thereon, the improvement which comprises including in at least one of silver halide emulsion layers and colloid layers permeable to water through to or out from said emulsion layer at least one development fog inhibiting compound represented by the following general formula (I): ##STR49## wherein A represents the heterocyclic group of a mercapto-antifoggant; Z represents a diacyl group of the formula ##STR50## or an atomic group necessary to form an indole ring; R 1 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group or alkoxycarbonyl group; R 2 represents a hydrogen atom, alkyl group or phenyl group; B represents a methylene group of the formula ##STR51## each represents a hydrogen atom or alkyl group; and the positions from 4 to 7 of the indole ring may be substituted with a halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group or alkoxycarbonyl group.
Claim 2
Dependent Claim
163 words
In a silver halide photographic photosensitive material which comprises a support and photographic layers provided thereon, the improvement which comprises including in at least one of silver halide emulsion layers and colloid layers permeable to water through to or out from said emulsion layer at least one development fog inhibiting compound represented by the following general formula (I): ##STR49## wherein A represents the heterocyclic group of a mercapto-antifoggant; Z represents a diacyl group of the formula ##STR50## or an atomic group necessary to form an indole ring; R 1 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group or alkoxycarbonyl group; R 2 represents a hydrogen atom, alkyl group or phenyl group; B represents a methylene group of the formula ##STR51## each represents a hydrogen atom or alkyl group; and the positions from 4 to 7 of the indole ring may be substituted with a halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group or alkoxycarbonyl group.
Claim 3
Dependent Claim
69 words
A photosensitive material according to claim 1, wherein said development fog inhibiting compound is represented by the following general formula (II): ##STR52## wherein A represents a heterocyclic group of the mercapto-antifoggant; B represents a methylene group of formula ##STR53## R 6 and R 7 each represents a hydrogen atom, alkyl group, or phenyl group, and R 3 , and R 4 each represents a hydrogen atom or alkyl group.
Claim 4
Dependent Claim
22 words
A photosensitive material according to claim 2, wherein R 3 and R 4 represent alkyl group of 1 to 10 carbon atoms.
Claim 5
Dependent Claim
110 words
A photosensitive material according to claim 1, wherein said development fog inhibiting compound is represented by the following general formula (III): ##STR54## wherein A represents a heterocyclic group of the mercapto-antifoggant; R 8 , R 9 , R 10 and R 11 each represents a hydrogen atom, halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group, or alkoxycarbonyl group; the alkyl group, alkoxy group or alkoxycarbonyl group represented by R 8 to R 11 may form a ring; R 12 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group, or alkoxycarbonyl group; and R 13 represents a hydrogen atom, alkyl group or phenyl group.
Claim 6
Dependent Claim
23 words
A photosensitive material according to claim 4, wherein R 12 is an alkyl group of 1 to 5 carbon atoms or phenyl group.
Claim 7
Dependent Claim
13 words
A photosensitive material according to claim 1, wherein R 2 is hydrogen atom.
Claim 8
Dependent Claim
125 words
A silver halide emulsion which contains at least one development fog inhibiting compound represented by the following general formula (I): ##STR55## wherein A represents the heterocyclic group of a mercaptoantifoggant; Z represents a diacyl group of the formula ##STR56## or an atomic group necessary to form an indole ring; R 1 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group or alkoxycarbonyl group; R 2 represents a hydrogen atom, alkyl group or phenyl group; B represents a methylene group of the formula ##STR57## each represents a hydrogen atom or alkyl group; and the positions from 4 to 7 of the indole ring may be substituted with a halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group or alkoxycarbonyl group.
Claim 9
Dependent Claim
125 words
A silver halide emulsion which contains at least one development fog inhibiting compound represented by the following general formula (I): ##STR55## wherein A represents the heterocyclic group of a mercaptoantifoggant; Z represents a diacyl group of the formula ##STR56## or an atomic group necessary to form an indole ring; R 1 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group or alkoxycarbonyl group; R 2 represents a hydrogen atom, alkyl group or phenyl group; B represents a methylene group of the formula ##STR57## each represents a hydrogen atom or alkyl group; and the positions from 4 to 7 of the indole ring may be substituted with a halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group or alkoxycarbonyl group.
Claim 10
Dependent Claim
174 words
A process for forming images which comprises exposing in an imagewise manner a silver halide photographic photosensitive material which contains in at least one of silver halide emulsion layers and colloid layers permeable to water through to or out from said emulsion layer at least one development fog inhibiting compound represented by the following general formula (I): ##STR58## wherein A represents the heterocyclic group of a mercapto-antifoggant; Z represents a diacyl group of the formula ##STR59## or an atomic group necessary to form an indole ring; R 1 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group or alkoxycarbonyl group; R 2 represents a hydrogen atom, alkyl group or phenyl group; B represents a methylene group of the formula ##STR60## R 3 and R 4 each represents a hydrogen atom or alkyl group; and the positions from 4 to 7 of the indole ring may be substituted with a halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group or alkoxycarbonyl group and then developing the exposed photosensitive material.
Claim 11
Dependent Claim
174 words
A process for forming images which comprises exposing in an imagewise manner a silver halide photographic photosensitive material which contains in at least one of silver halide emulsion layers and colloid layers permeable to water through to or out from said emulsion layer at least one development fog inhibiting compound represented by the following general formula (I): ##STR58## wherein A represents the heterocyclic group of a mercapto-antifoggant; Z represents a diacyl group of the formula ##STR59## or an atomic group necessary to form an indole ring; R 1 represents a hydrogen atom, alkyl group, phenyl group, carboxyl group or alkoxycarbonyl group; R 2 represents a hydrogen atom, alkyl group or phenyl group; B represents a methylene group of the formula ##STR60## R 3 and R 4 each represents a hydrogen atom or alkyl group; and the positions from 4 to 7 of the indole ring may be substituted with a halogen atom, alkyl group, phenyl group, alkoxy group, hydroxyl group, nitro group, carboxyl group or alkoxycarbonyl group and then developing the exposed photosensitive material.
Claim 12
Dependent Claim
25 words
A photosensitive material according to claim 1 wherein said compound is added in an amount of 0.1 to 100 millimole per mole of silver halide.
Claim 13
Dependent Claim
23 words
A photosensitive material according to claim 9 wherein said compound is added in an 0.5 to 50 millimoles per mole of silver halide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |