Patent US4617258A successfully refreshed from Google Patents.
US4617258A
Expired / Lapsed
US
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Silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1986-03-25
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Granted: 1986-10-14
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Expires: 2006-03-25
Abstract
Abstract A silver halide photographic material is disclosed. It contains per 100 g of silver at least 40 mg of a water-soluble compound comprising an element of group VIII of the periodic table and having a molecular weight of at least 100, and 1.2 to 120 mg of a black-and-white silver halide developing agent. The material has improved gradation characteristics and is subject to minimum variation in photographic characteristics.
Inventors
- 👤 Hiroshi Menjo
- 👤 Nobuo Sakamoto
- 👤 Yoshikazu Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/42; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A silver halide photographic material containing 40-500 mg. per 100 g of silver, of a water-soluble compound comprising a metal selected from ruthenium, rhodium, palladium, osmium, iridium, and platinum and having a molecular weight of at least 100; and 1.2 to 120 mg of a black-and-white silver halide developing agent per 100 g of silver.
Claim 2
Dependent Claim
55 words
A silver halide photographic material containing 40-500 mg. per 100 g of silver, of a water-soluble compound comprising a metal selected from ruthenium, rhodium, palladium, osmium, iridium, and platinum and having a molecular weight of at least 100; and 1.2 to 120 mg of a black-and-white silver halide developing agent per 100 g of silver.
Claim 3
Dependent Claim
30 words
A silver halide photographic material according to claim 1, wherein the cation of said salt of metal is an ammonium ion or an alkaline metal or alkaline earth metal ion.
Claim 4
Dependent Claim
44 words
A silver halide photographic material according to claim 1, wherein the ligand of said salt of metal is selected from among a hydroxy group, a cyano, H 2 O, a halogen atom, a nitro, SO 3 , ammonia and C 2 O 4 .
Claim 5
Dependent Claim
22 words
A silver halide photographic material according to claim 1, wherein said salt of metal is a salt of rhodium, iridium or platinum.
Claim 6
Dependent Claim
33 words
A silver halide photographic material according to claim 1, wherein said water-soluble compound is added in the photographic material in an amount of 40 mg to 500 mg per 100 g of silver.
Claim 7
Dependent Claim
25 words
A silver halide photographic material according to claim 1, wherein said water-soluble compound is contained in the silver halide emulsion layer of the photographic material.
Claim 8
Dependent Claim
21 words
A silver halide photographic material according to claim 1, wherein said developing agent is a 3-pyrazolidone compound or a hydroxybenzene compound.
Claim 9
Dependent Claim
29 words
A silver halide photographic material according to claim 7, wherein said 3-pyrazolidone compound is selected from among 1-phenyl-3-pyrazolidone, 1-p-tolyl-3-pyrazolidone, 5-phenyl-3-pyrazolidone, 5-methyl-3-pyrazolidone, 1-phenyl-5-methyl-3-pyrazolidone, 1-acetamidophenyl-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, 1-p-tolyl-4,4-dimethyl-3-pyrazolidone, 1-phenyl-4-methyl-3-pyrazolidone, 4-hydroxy-4-methyl-1-phenyl-3-pyrazolidone and 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone.
Claim 10
Dependent Claim
26 words
A silver halide photographic material accoring to claim 7, wherein said hydroxybenzene compound is selected from among hydroquinone, catechol, pyrogallol, N-methyl-p-aminophenol, p-β-hydroxyethylaminophenol, p-α-aminoethylaminophenol and N-methyl-N-(μ-sulfoamidoethyl) -p-aminophenol.
Claim 11
Dependent Claim
32 words
A silver halide photographic material according claim 1, wherein said developing agent is contained in the photographic material in an amount of 11 mg to 110 mg per 100 g of silver.
Claim 12
Dependent Claim
25 words
A silver halide photographic material according to claim 1, wherein said developing agent is incorporated in the silver halide emulsion layer of the photographic material.
Claim 13
Dependent Claim
27 words
A silver halide photographic material according to claim 1, wherein said water-soluble compound and said developing agent are incorporated in the same layer of the photographic material.
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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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |