US5075209A
Expired / Lapsed
US
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Silver halide photographic light-sensitive material
Assignee: Konica Minolta Inc
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Filing: 1990-08-15
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Granted: 1991-12-24
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Expires: 2010-08-15
Abstract
Abstract A silver halide photographic light-sensitive material is disclosed, which has high sensitivity, high contrast and improved standing stability in the manufacturing process. The light-sensitive material has a silver halide emulsion layer and silver halide grains contained in the emulsion layer are spectrally sensitized by a specific sensitizing dye dissolved in a chain hydrocarbon compound having two or more more hydroxy groups or a mixture of the hydrocarbon compound and a water-miscible solvent.
Inventors
- 👤 Takayuki Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18; G03C1/38; G03C1/385
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
In a silver halide photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing silver halide grains which have been spectrally sensitized by addition of a sensitizing dye at any time between before the termination of desalination and before the termination of chemical aging, the improvement wherein said sensitizing dye is a compound represented by the following Formula I, said compound being added in a solution with a chain hydrocarbon compound having two or more hydroxy groups or a mixture of said hydrocarbon compound having two or more hydroxy groups and a water-miscible solvent. ##STR13## wherein Z 1 , and Z 2 , are independently a group of atoms necessary to form a benzothiazole nucleus, a benzoselenazole nucleus, a naphthothiazole nucleus or a naphthoselenazole nucleus, each of said nucleus may have a substituent; R 1 , and R 2 , are independently a substituted or unsubstituted lower alkyl group; X is an anion; and n is an integer of 1 or 2 provided that n is 1 when an intramolecular salt is formed.
Claim 2
Dependent Claim
177 words
In a silver halide photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing silver halide grains which have been spectrally sensitized by addition of a sensitizing dye at any time between before the termination of desalination and before the termination of chemical aging, the improvement wherein said sensitizing dye is a compound represented by the following Formula I, said compound being added in a solution with a chain hydrocarbon compound having two or more hydroxy groups or a mixture of said hydrocarbon compound having two or more hydroxy groups and a water-miscible solvent. ##STR13## wherein Z 1 , and Z 2 , are independently a group of atoms necessary to form a benzothiazole nucleus, a benzoselenazole nucleus, a naphthothiazole nucleus or a naphthoselenazole nucleus, each of said nucleus may have a substituent; R 1 , and R 2 , are independently a substituted or unsubstituted lower alkyl group; X is an anion; and n is an integer of 1 or 2 provided that n is 1 when an intramolecular salt is formed.
Claim 3
Dependent Claim
16 words
A material of claim 1, wherein said chain hydrocarbon compound has 1 to 18 carbon atoms.
Claim 4
Dependent Claim
16 words
A material of claim 2, wherein said chain hydrocarbon compound has 1 to 12 carbon atoms.
Claim 5
Dependent Claim
45 words
A material of claim 3, wherein said chain hydrocarbon compound is selected from the group consisting of trimethylene glycol, propylene glycol, butylene glycol, pentamethylene glycol, triethylene glycol, hexamethlene glycol, decamethylene glycol, 1-methyl glycerol, erythritol, 1,2,3,4,-pentane tetrol, 2,3,3,4-tetramethyl-2,4,-pentane diol, 2,2,4-trimethyl-1.3-pentane diol, 2,4-dimethyl-hexane triol and trimethylol propane.
Claim 6
Dependent Claim
14 words
A material of claim 3, wherein said chain compound is ethylene glycol or glycerol.
Claim 7
Dependent Claim
26 words
A material of claim 1, wherein said water-miscible solvent is selected from the group consisting of methanol, ethanol, propanol, methyl cellosolve, halogeneated alcohols, aceton and pyridine.
Claim 8
Dependent Claim
14 words
A material of claim 6, wherein said water-miscible solvent is methanol, ethanol or acetone.
Claim 9
Dependent Claim
38 words
A material of claim 1, wherein said chain hydrocarbon compound is added to said silver halide emulsion in an amount of from 0.01 g to 200 g per mol of silver contained in said silver halide emulsion layer.
Claim 10
Dependent Claim
38 words
A material of claim 8, wherein said chain hydrocarbon compound is added to said silver halide emulsion in an amount of from 0.1 g to 80 g per mol of silver contained in said silver halide emulsion layer.
Claim 11
Dependent Claim
47 words
A material of claim 1, wherein the amount of said water-miscible solvent added to said silver halide emulsion with said chain hydrocarbon compound as the mixture is within the range of from 0.01 to 200 g per mol of silver halide contained in said silver halide emulsion.
Claim 12
Dependent Claim
47 words
A material of claim 10, wherein the amount of said water-miscible solvent added to said silver halide emulsion with said chain hydrocarbon compound as the mixture is within the range of from 0.1 to 80 g per mol of silver halide contained in said silver halide emulsion.
Claim 13
Dependent Claim
19 words
A material of claim 1, wherein at least one layer of said light-sensitive material contains a fluorine containing surfactant.
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) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |