US4348474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light sensitive photographic recording material and the use thereof for the production of photographic images
Assignee: Agfa Gevaert AG
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Filing: 1981-07-23
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Granted: 1982-09-07
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Expires: 2001-07-23
Abstract
Abstract A photographic recording material having at least 2 panchromatically sensitized silver-halide emulsion layers differing in speed, a DIR-compound and at least 2 yellow couplers of differing coupling velocity provides an improved graininess.
Inventors
- 👤 Rainer Scheerer
- 👤 Erwin Ranz
- 👤 Joachim W. Lohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:25
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3003; G03C7/3029; G03C2007/3034; G03C7/305; G03C7/30541
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
Photographic recording material having at least two panchromatically sensitised silver halide emulsion layers differing in speed, the faster layer being further removed from the support than the slower layer, and each of these two layers containing at least two colour couplers at least one of which produces a yellow dye on chromogenic development, wherein at least one layer contains a compound capable of splitting off a development inhibitor, and whereby the faster silver halide emulsion layer contains a yellow coupler in a relatively rapidly coupling form and the slower layer contains a yellow coupler in a relatively slowly coupling form.
Claim 2
Dependent Claim
100 words
Photographic recording material having at least two panchromatically sensitised silver halide emulsion layers differing in speed, the faster layer being further removed from the support than the slower layer, and each of these two layers containing at least two colour couplers at least one of which produces a yellow dye on chromogenic development, wherein at least one layer contains a compound capable of splitting off a development inhibitor, and whereby the faster silver halide emulsion layer contains a yellow coupler in a relatively rapidly coupling form and the slower layer contains a yellow coupler in a relatively slowly coupling form.
Claim 3
Dependent Claim
20 words
Material according to claim 1, wherein at least one panchromatically sensitised layer contains a magenta coupler and a cyan coupler.
Claim 4
Dependent Claim
40 words
Material according to claim 1, wherein at least one yellow coupler in the faster layer is hydrophilic and in a dissolved form and wherein at least one yellow coupler in the slower layer is hydrophobic and in an emulsified form.
Claim 5
Dependent Claim
39 words
Material according to claim 3, wherein the faster layer in addition contains at least one slowly coupling magenta coupler and one slowly coupling cyan coupler and wherein the slower layer also contains a magenta coupler and a cyan coupler.
Claim 6
Dependent Claim
22 words
Material according to claim 1, wherein the compound capable of releasing an inhibitor is contained in at least two panchromatically sensitised layers.
Claim 7
Dependent Claim
13 words
Material according to claim 5, wherein the inhibitor released is a mercapto compound.
Claim 8
Dependent Claim
38 words
Material according to claim 1, wherein a yellow coupler in a relatively slowly coupling form is contained in the faster silver halide emulsion layer and a yellow coupler in a relatively rapidly coupling form in the slower layer.
Claim 9
Dependent Claim
20 words
Process for the production of photographic images, wherein the material according to claim 1 is exposed imagewise and chromogenically developed.
Claim 10
Dependent Claim
17 words
Process according to claim 7, wherein the developer used is a compound of the p-phenylene diamine series.
References Cited (Backward Citations)
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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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |