US5238801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating a silver halide photographic element
Assignee: Fujifilm Corp
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Filing: 1992-10-22
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Granted: 1993-08-24
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Expires: 2012-10-22
Abstract
Abstract A silver halide photographic material which has at least one silver halide emulsion layer on a support, wherein there is incorporated at least one electrically conductive layer of which the surface resistance is not more than 10 12 Ω under conditions of 25° C., 25% RH, which photographic material has been dried out at a relative humidity of not more than 50% when the water content is not more than 300 wt% with respect to the total dry weight of the binder included in the silver halide emulsion layers and other hydrophilic layers on the support, which was subjected, after drying, to a heat treatment of duration at least 6 hours at a temperature of at least 30° C. in an atmosphere of absolute humidity not more than 0.01, and which has been stored under conditions of absolute humidity not more than 0.01.
Inventors
- 👤 Kunio Ishigaki
- 👤 Ken-ichi Kuwabara
- 👤 Akira Hatakeyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/74
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
A method for imparting improved dimensional stability to a silver halide photographic element, comprising providing on a support at least one hydrophilic coating layer including at least one silver halide emulsion coating layer containing binder and water, and providing at least one non-photosensitive electrically conductive layer of which the surface resistance is not more than 10 12 Ω under conditions of 25° C., 25% RH, drying the photographic element at a relative humidity of not more than 50% when the water content is not more than 300 wt% with respect to the total dry weight of the binder included in said at least one silver halide emulsion coating layer and any other hydrophilic coating layers on the support, and then subjecting the photographic element, after said drying, to a separate heat treatment of a duration at least 6 hours at a temperature of at least 30° C. in an atmosphere of an absolute humidity of not more than 0.01, and then storing said photographic element under conditions of an absolute humidity of not more than 0.01.
Claim 2
Independent Claim
176 words
A method for imparting improved dimensional stability to a silver halide photographic element, comprising providing on a support at least one hydrophilic coating layer including at least one silver halide emulsion coating layer containing binder and water, and providing at least one non-photosensitive electrically conductive layer of which the surface resistance is not more than 10 12 Ω under conditions of 25° C., 25% RH, drying the photographic element at a relative humidity of not more than 50% when the water content is not more than 300 wt% with respect to the total dry weight of the binder included in said at least one silver halide emulsion coating layer and any other hydrophilic coating layers on the support, and then subjecting the photographic element, after said drying, to a separate heat treatment of a duration at least 6 hours at a temperature of at least 30° C. in an atmosphere of an absolute humidity of not more than 0.01, and then storing said photographic element under conditions of an absolute humidity of not more than 0.01.
Claim 3
Dependent Claim
33 words
A method as in claim 1 wherein said electrically conductive layer contains a metal oxide selected from metal oxides having an oxygen defect and metal oxides which contain small amounts of metal donors.
Claim 4
Dependent Claim
29 words
A method as in claim 1, wherein said metal donors are present in an amount of from 0.01 mol% to 30 mol% based on the amount of metal oxide.
Claim 5
Dependent Claim
29 words
A metal as in claim 1, wherein said metal donors are present in an amount of from 0.1 mol% to 10 mol% based on the amount of metal oxide.
Claim 6
Dependent Claim
17 words
A method as in claim 1, wherein said electrically conductive layer contains an electrically conductive polymeric compound.
Claim 7
Dependent Claim
21 words
A method as in claim 1, wherein the surface resistivity of the conductive layer is not more than 10 11 ohm.
Claim 8
Dependent Claim
17 words
A method as in claim 1, wherein the support is a biaxially extended and crystallized polyester film.
Claim 9
Dependent Claim
42 words
A method as in claim 1, wherein said drying is carried out until the water content of the layers provided on the support is 15 wt% or less based on the weight of total binder in the layers provided on the support.
Claim 10
Dependent Claim
63 words
A method as in claim 1, produced by a process wherein the water content of the layers provided on the support is initially greater than 300 wt%, said photographic material is dried to 300 wt% water based on the weight of total binder in the layers provided on the support, and is then dried at a relative humidity of not more than 50%.
Claim 11
Dependent Claim
56 words
A method as in claim 1, wherein said drying out at a relative humidity of not more than 50% is continued until the water content is reduced to less than 15 wt% with respect to the total dry weight of the binder included in the silver halide emulsion layers and other hydrophilic layers on the support.
Claim 12
Dependent Claim
56 words
A method as in claim 1, wherein said drying out at a relative humidity of not more than 50% is continued until the water content is reduced to less than 10 wt% with respect to the total dry weight of the binder included in the silver halide emulsion layers and other hydrophilic layers on the support.
Claim 13
Dependent Claim
36 words
A method for imparting improved dimensional stability to a silver halide photographic element as in claim 1, where said at least one non-photosensitive electrically conductive layer contains electrically conductive metal oxides or electrically conductive polymeric compounds.
References Cited (Backward Citations)
US4495276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |