US3607278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements containing fogged and unfogged silver halide grains and a slow silver halide emulsion layer
Assignee: Eastman Kodak Co
•
Filing: 1968-04-18
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Granted: 1971-09-21
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Expires: 1988-04-18
Abstract
Abstract Improved photographic elements comprising fogged and unfogged silver halide grains and a slow speed sliver halide emulsion layer exhibiting improved antifoggant properties in developer solutions are disclosed. Still another object of this invention is to provide improved photographic elements comprising surface latent image iodidecontaining silver halide grains and fogged internal latent image silver halide grains.
Inventors
- 👤 Joseph R Ditzer Jr
- 👤 Fred W Spangler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/46
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
31 words
A photographic element of claim 1 in which said unfogged surface latent image iodide-containing silver halide grains and said fogged internal latent image silver halide grains are each in discrete layers.
Claim 2
Dependent Claim
30 words
A photographic element of claim 1 in which said unfogged surface latent image iodide-containing silver halide grains and said fogged internal latent image silver halide grains are in one layer.
Claim 3
Dependent Claim
39 words
A photographic element of claim 1 in which said unfogged surface latent image iodide-containing silver halide grains and said fogged internal latent image silver halide grains are each in discrete layers farther from said support than said layer (I).
Claim 4
Dependent Claim
35 words
A photographic element of claim 1 in which said unfogged surface latent image iodide-containing silver halide grains and said fogged internal latent image silver halide grains are in one layer adjacent to said layer (I).
Claim 5
Dependent Claim
25 words
A photographic element of claim 1 in which said unfogged surface image iodide-containing silver halide grains contain about 0.5 to about 10 mole percent iodide.
Claim 6
Dependent Claim
26 words
A photographic element of claim 6 in which the halide in said silver halide grains in layer (I) is at least about 30 mole percent chloride.
Claim 7
Dependent Claim
49 words
A photographic element of claim 1 in which said unfogged surface latent image iodide-containing grains and certain of said fogged internal latent image silver halide grains are in one layer and certain of said fogged internal latent image silver halide grains are in another layer other than layer (I).
Claim 8
Dependent Claim
20 words
The element of claim 8 in which layer (I) is disposed closer to said support than are said fogged grains.
Claim 9
Dependent Claim
20 words
The element of claim 1 in which said surface latent image iodide-containing silver halide grains are chemically and spectrally sensitized.
Claim 10
Dependent Claim
20 words
The element of claim 8 in which said layer (I) is farther from said support than are said fogged grains.
References Cited (Backward Citations)
US2456956A
Cited
US2452765A
Cited
US2996382A
Cited
US3178282A
Cited
US3206313A
Cited
US3490751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |