US5266451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic recording material
Assignee: Agfa Gevaert AG
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Filing: 1992-05-04
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Granted: 1993-11-30
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Expires: 2012-05-04
Abstract
Abstract A color photographic recording material with a reflective support which contains a spectrally sensitized silver halide emulsion containing at least one sensitizer for the spectral region B in a layer free from color coupler adjacent at least one dye-producing silver halide emulsion layer sensitized for the spectral region A, the sensitivity of the spectrally sensitized silver halide emulsion of the layer free from color coupler being lower by 0.6 to 2.5 log H units than the sensitivity of the sensitized silver halide emulsion of the dye-producing silver halide emulsion layer, is distinguished by an extended gradation range in the region of the maximum densities and, hence, by distinctly improved fine detail resolution at high densities.
Inventors
- 👤 Arno Schmuck
- 👤 Manfred Peters
- 👤 Helmut Kampfer
- 👤 Wolfgang Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:23
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C2200/00; G03C2200/11; G03C2200/20; G03C2200/35
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A color photographic recording material with a reflective support comprising three dye-producing silver halide emulsion layers sensitized for the spectral regions A, B and C and interlayers free from color couplers, characterized in that the interlayer between A and B contains at least one spectrally sensitized silver halide emulsion containing at least one sensitizer for at least one of the regions A, B or C and the interlayer between B and C contains at least one spectrally sensitized silver halide emulsion containing at least one sensitizer for at least one of the regions A, B or C, the sensitivity of the spectrally sensitized silver halide emulsions of the interlayers free from color couplers being lower by 0.6 to 2.5 log H units than the sensitivity of the sensitized silver halide emulsions of the dye-producing silver halide emulsion layers.
Claim 2
Dependent Claim
138 words
A color photographic recording material with a reflective support comprising three dye-producing silver halide emulsion layers sensitized for the spectral regions A, B and C and interlayers free from color couplers, characterized in that the interlayer between A and B contains at least one spectrally sensitized silver halide emulsion containing at least one sensitizer for at least one of the regions A, B or C and the interlayer between B and C contains at least one spectrally sensitized silver halide emulsion containing at least one sensitizer for at least one of the regions A, B or C, the sensitivity of the spectrally sensitized silver halide emulsions of the interlayers free from color couplers being lower by 0.6 to 2.5 log H units than the sensitivity of the sensitized silver halide emulsions of the dye-producing silver halide emulsion layers.
Claim 3
Dependent Claim
48 words
A color photographic recording material as claimed in claim 1, characterized in that the interlayer between the silver halide emulsion layers sensitized for the spectral regions A and B contains both a sensitizer for the spectral region A or B and a sensitizer for the spectral region C.
Claim 4
Dependent Claim
48 words
A color photographic recording material as claimed in claim 1, characterized in that the interlayer between the silver halide emulsion layers sensitized for the spectral regions B and C contains both a sensitizer for the spectral region B or C and a sensitizer for the spectral region A.
Claim 5
Dependent Claim
32 words
A color photographic recording material as claimed in claim 1, characterized in that the spectral regions A, B and C stand in any order for the red, green and blue spectral regions.
Claim 6
Dependent Claim
126 words
A color photographic recording material with a reflective support which contains a spectrally sensitized silver halide emulsion containing at least one sensitizer for a spectral region B in a layer free from color coupler adjacent at least one dye-producing silver halide emulsion layer sensitized for the spectral region A, the sensitivity of the spectrally sensitized silver halide emulsion of the layer free from color coupler being lower by 0.6 to 2.5 log H units than the sensitivity of the sensitized silver halide emulsion of the dye-producing silver halide emulsion layer, wherein the spectral regions A and B stand in any order for the red, green and blue spectral regions and the silver halides of all the photosensitive layers, contain at least 80 mol-% of silver chloride.
Claim 7
Dependent Claim
126 words
A color photographic recording material with a reflective support which contains a spectrally sensitized silver halide emulsion containing at least one sensitizer for a spectral region B in a layer free from color coupler adjacent at least one dye-producing silver halide emulsion layer sensitized for the spectral region A, the sensitivity of the spectrally sensitized silver halide emulsion of the layer free from color coupler being lower by 0.6 to 2.5 log H units than the sensitivity of the sensitized silver halide emulsion of the dye-producing silver halide emulsion layer, wherein the spectral regions A and B stand in any order for the red, green and blue spectral regions and the silver halides of all the photosensitive layers, contain at least 80 mol-% of silver chloride.
Claim 8
Dependent Claim
37 words
A color photographic recording material as claimed in claim 5, characterized in that the layer free from color coupler is an interlayer between two dye-producing silver halide emulsion layers sensitized for the spectral regions A and B.
Claim 9
Dependent Claim
36 words
A color photographic recording material as claimed in claim 6, characterized in that the interlayer free from color coupler contains both a sensitizer for the spectral region A and a sensitizer for the spectral region B.
Claim 10
Dependent Claim
30 words
A color photographic recording material as claimed in claim 5, characterized in that the spectral regions A and B are the green and red or red and green spectral regions.
Claim 11
Dependent Claim
41 words
A color photographic recording material as claimed in claim 5, characterized in that the silver halides of all the photosensitive layers, including the interlayers, contain 95 to 100 mol-% chloride, 0 to 5 mol-% bromide and 0 to 1 mol-% iodide.
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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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |