US4713319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat developable photosensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1985-07-23
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Granted: 1987-12-15
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Expires: 2005-07-23
Abstract
Abstract A heat developable photosensitive material having on a support, a light-sensitive layer containing a light-sensitive silver halide, silver salt grains having a dissolution retarder adsorbed thereto, a reducing agent, and a binder. This material can provide high image density and low fog density and has excellent keeping quality.
Inventors
- 👤 Toshiaki Aono
- 👤 Hiroshi Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49818
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A heat developable photosensitive material comprising a support, having a light-sensitive layer thereon wherein said light-sensitive layer comprises a light-sensitive silver halide, silver salt grains having a dissolution retarder absorbed thereto, a reducing agent, and a binder, wherein said dissolution retarder is selected from the group consisting of compounds having a mercapto group and compounds having a heterocyclic ring containing a NH group.
Claim 2
Dependent Claim
63 words
A heat developable photosensitive material comprising a support, having a light-sensitive layer thereon wherein said light-sensitive layer comprises a light-sensitive silver halide, silver salt grains having a dissolution retarder absorbed thereto, a reducing agent, and a binder, wherein said dissolution retarder is selected from the group consisting of compounds having a mercapto group and compounds having a heterocyclic ring containing a NH group.
Claim 3
Dependent Claim
37 words
A heat developable photosensitive material as claimed in claim 1, wherein said silver salt grains have a sensivitity to light lower than the light-sensitivity of said light-sensitive silver halide by a factor of at least about 10.
Claim 4
Dependent Claim
34 words
A heat developable photosensitive material as claimed in claim 1, wherein said silver salt grains in the absence of said adsorbed dissolution retarder have a greater solubility in water than said light-sensitive silver halide.
Claim 5
Dependent Claim
38 words
A heat developable photosensitive material as claimed in claim 1, wherein said silver salt grains comprise a primitive emulsion of silver chloride, silver bromide or silver chlorobromide having a grain size from about 0.01 μm to 2 μm.
Claim 6
Dependent Claim
27 words
A heat developable photosensitive material as claimed in claim 4, wherein the grain size of said silver salt grains is from about 0.05 μm to 0.5 μm.
Claim 7
Dependent Claim
33 words
A heat developable photosensitive material as claimed in claim 1, wherein said silver salt is present in an amount of from about 0.1 to 100 mol per mol of said light-sensitive silver halide.
Claim 8
Dependent Claim
34 words
A heat developable photosensitive material as claimed in claim 6, wherein said silver salt grains are present in an amount of from about 0.5 to 5 mol per mol of said light-sensitive silver halide.
Claim 9
Dependent Claim
35 words
A heat developable photosensitive material as claimed in claim 1, wherein said dissolution retarder is selected from the group consisting of compounds containing a moiety selected from the group consisting of ##STR23## and tautomers thereof.
Claim 10
Dependent Claim
38 words
A heat developable photosensitive material as claimed in claim 1, wherein said light-sensitive silver halide is high-speed silver iodobromide having an iodide content of about 50 mol percent or less, said light-sensitive silver halide emulsion being spectrally sensitized.
Claim 11
Dependent Claim
15 words
A heat developable photosensitive material as claimed in claim 1, further comprising a thermal solvent.
Claim 12
Dependent Claim
29 words
A heat developable photosensitive material as claimed in claim 1, further comprising a compound capable of forming a diffusible complex compound by reaction with said silver halide during development.
References Cited (Backward Citations)
US3652279A
Cited
US4307187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |