US5364747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color correcting layers consisting essentially of at least one dye-forming coupler and gelatin in chromogenic black-and-white photographic imaging systems
Assignee: Eastman Kodak Co
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Filing: 1992-11-25
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Granted: 1994-11-15
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Expires: 2012-11-25
Abstract
Abstract The invention is accomplished by forming balanced cyan, magenta, and yellow coupler and emulsion mixes. There is at least one layer in which silver halide emulsion has been sensitized to blue light or silver halide emulsion sensitive to green light. Regardless of the color sensitivity of the silver halide layer that contains silver contains a mix of cyan, magenta, and yellow dye-forming couplers. Further, in order to have a black-and-white image that has a lightness such as observed by the human eye in a scene, it is preferred that the ratios of red sensitive emulsion to green sensitive emulsion to blue sensitive emulsion in the photographic element is about 2:3:1.
Inventors
- 👤 James L. Edwards
- 👤 Paul T. Hahm
- 👤 Joseph E. LaBarca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
53 words
A photographic element comprising a support having thereon at least one imaging layer comprising at least one silver halide emulsion with grains sensitized with one color and balanced cyan, magenta and yellow dye forming couplers, and at least one color correcting layer consisting essentially of at least one dye forming coupler and gelatin.
Claim 2
Dependent Claim
53 words
A photographic element comprising a support having thereon at least one imaging layer comprising at least one silver halide emulsion with grains sensitized with one color and balanced cyan, magenta and yellow dye forming couplers, and at least one color correcting layer consisting essentially of at least one dye forming coupler and gelatin.
Claim 3
Dependent Claim
61 words
The photographic element of claim 1 wherein said color correcting layer is adjacent to at least one imaging layer comprising at least one of, blue sensitized silver halide grains which are only sensitized to blue light, and green sensitized silver halide grains which are only sensitized to green light, in combination with neutral balanced cyan, magenta, and yellow dye forming couplers.
Claim 4
Dependent Claim
23 words
The element of claim 2 wherein the balanced couplers are not balanced at high density and said color correcting layer provides increased density.
Claim 5
Dependent Claim
19 words
The element of claim 1 wherein said coupler in said color correcting layer comprises a magenta dye forming coupler.
Claim 6
Dependent Claim
28 words
The element of claim 2 wherein said at least one imaging layer comprises magenta, cyan, and yellow dye forming couplers and red, blue, and green sensitized silver halide.
Claim 7
Dependent Claim
21 words
The element of claim 4 wherein said color correcting layer further comprises yellow dye forming coupler and cyan dye forming coupler.
Claim 8
Dependent Claim
44 words
The element of claim 1 wherein said color correcting layer is adjacent to at least one imaging layer comprising balanced magenta, cyan, and yellow dye forming couplers and red sensitized silver halide grains, green sensitized silver halide grains, and blue sensitized silver halide grains.
Claim 9
Dependent Claim
19 words
The element of claim 7 wherein said balanced dye forming couplers are balanced to form black and white images.
Claim 10
Dependent Claim
18 words
The element of claim 2 wherein said color correcting layer provides improved high densities in the developed element.
Claim 11
Dependent Claim
123 words
A photographic element comprising at least one imaging layer comprising at least one layer of neutral balanced cyan, magenta, and yellow dye forming couplers with blue sensitized silver halide grains which are only sensitized to blue light, and at least one layer Of balanced cyan, magenta, and yellow dye forming couplers with green sensitized silver halide grains which are only sensitized to green light, and adjacent to said at least one imaging layer a color correcting layer consisting essentially of gelatin and at least one dye forming coupler that forms at least one dye that compliments the color formed in said at least one imaging layer to produce a desired high density color and wherein said silver halide is sensitized with one color.
Claim 12
Dependent Claim
123 words
A photographic element comprising at least one imaging layer comprising at least one layer of neutral balanced cyan, magenta, and yellow dye forming couplers with blue sensitized silver halide grains which are only sensitized to blue light, and at least one layer Of balanced cyan, magenta, and yellow dye forming couplers with green sensitized silver halide grains which are only sensitized to green light, and adjacent to said at least one imaging layer a color correcting layer consisting essentially of gelatin and at least one dye forming coupler that forms at least one dye that compliments the color formed in said at least one imaging layer to produce a desired high density color and wherein said silver halide is sensitized with one color.
Claim 13
Dependent Claim
25 words
The element of claim 10 wherein there is one imaging layer and said imaging layer comprises red sensitized, blue sensitized, and green sensitized silver halide.
Claim 14
Dependent Claim
68 words
The element of claim 10 wherein there are at least three imaging layers, at least one layer comprising balanced cyan, magenta, and yellow dye forming couplers and red sensitized silver halide, at least one layer of balanced magenta, cyan, and yellow dye forming couplers and blue sensitized silver halide, and at least one layer of balanced magenta, cyan, and yellow dye forming couplers and green sensitized silver halide.
Claim 15
Dependent Claim
20 words
The element of claim 12 wherein said balanced dye forming couplers are balanced to form a black and white image.
Claim 16
Dependent Claim
16 words
The element of claim 12 wherein said element after exposure and development forms a black-and-white image.
Claim 17
Dependent Claim
46 words
A photographic element comprising a color correcting layer adjacent a balanced layer of magenta, cyan, and yellow couplers wherein said color correcting layer comprises a dye forming color correcting coupler that functions to increase the higher densities of the color formed by said color correcting coupler.
Claim 18
Dependent Claim
46 words
A photographic element comprising a color correcting layer adjacent a balanced layer of magenta, cyan, and yellow couplers wherein said color correcting layer comprises a dye forming color correcting coupler that functions to increase the higher densities of the color formed by said color correcting coupler.
Claim 19
Dependent Claim
14 words
The element of claim 1 wherein said color correcting layer adjusts tone and lightness.
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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) | 1997-11-14 | 1998-05-16 | 1998-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-14 | 2002-05-16 | 2002-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-14 | 2006-05-16 | 2006-11-15 | $7700.00 | Window Closed / Lapsed |