Patent US4477561A successfully refreshed from Google Patents.
US4477561A
Expired / Lapsed
US
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Silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1983-02-17
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Granted: 1984-10-16
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Expires: 2003-02-17
Abstract
Abstract A silver halide photographic material having formed on a support two or more layers that are sensitive to the lights of substantially the same spectral region but different in light sensitivity is disclosed. At least one of the layers other than the one having maximum light sensitivity contains at least 40 mg, per 100 g of silver, of a water-soluble compound containing an element of Group VIII of the periodic table which has a molecular weight of 100 or more. The material has a wide latitude for exposure, and this latitude will not vary greatly with time during storage.
Inventors
- 👤 Hiroshi Menjo
- 👤 Yoshikazu Watanabe
- 👤 Nobuo Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C1/46; G03C2001/093; G03C2001/094
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
A silver halide photographic material having a wide latitude for exposure which will not vary greatly with time during storage, said material having formed on a support two or more layers that are sensitive to the lights of substantially the same spectral region but different in light sensitivity, wherein at least one of the layers other than the layer having maximum light sensitivity contains at least 40 mg, per 100 g of silver, of a water-soluble compound containing an element of Group VIII of the periodic table which has a molecular weight of 100 or more and the layer having maximum light sensitivity contains a water-soluble compound containing an element of Group VIII of the periodic table with a molecular weight of 100 or more in an amount that does not exceed 40 mg per 100 g of silver.
Claim 2
Dependent Claim
139 words
A silver halide photographic material having a wide latitude for exposure which will not vary greatly with time during storage, said material having formed on a support two or more layers that are sensitive to the lights of substantially the same spectral region but different in light sensitivity, wherein at least one of the layers other than the layer having maximum light sensitivity contains at least 40 mg, per 100 g of silver, of a water-soluble compound containing an element of Group VIII of the periodic table which has a molecular weight of 100 or more and the layer having maximum light sensitivity contains a water-soluble compound containing an element of Group VIII of the periodic table with a molecular weight of 100 or more in an amount that does not exceed 40 mg per 100 g of silver.
Claim 3
Dependent Claim
30 words
A silver halide photographic material according to claim 1, wherein said water-soluble compound is a salt of a metal of Group VIII 5 or VIII 6 of the periodic table.
Claim 4
Dependent Claim
43 words
A silver halide photographic material according to claim 1, wherein at least one of the layers other than the one having maximum light sensitivy contains said water-soluble compound in an amount ranging from 40 mg to 500 mg per 100 g of silver.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |