US4770980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer color photographic recording material wherein a red secondary sensitivity is produced in the blue and green layers
Assignee: Agfa Gevaert AG
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Filing: 1987-06-15
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Granted: 1988-09-13
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Expires: 2007-06-15
Abstract
Abstract A color photographic recording material comprising at least one layer of which the primary sensitivity is blue, another layer of which the primary sensitivity is green and a further layer of which the primary sensitivity is red, gives satisfactory density graduations for details of high color saturation when a red sensitivity is produced in at least one layer, of which the primary sensitivity is green, and in at least one layer, of which the primary sensitivity is blue, the primary sensitivity being 8 to 25 DIN higher than the secondary sensitivity.
Inventors
- 👤 Reinhart Matejec
- 👤 Erwin Ranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:31
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3041
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A color photographic recording material comprising at least one layer of which the primary sensitivity is blue, another layer of which the primary sensitivity is green and a further layer of which the primary sensitivity is red, which layers contain the particular color couplers coupling complementarily thereto and of which the IIE is at least 5% in the blue-sensitive and in the red-sensitive layer and at least 10% in the green-sensitive layer, characterized in that a red secondary sensitivity is produced in at least one layer, of which the primary sensitivity is green, and in at least one layer, of which the primary sensitivity is blue, the primary sensitivity being 8 to 25 DIN higher than the secondary sensitivity in either case.
Claim 2
Dependent Claim
122 words
A color photographic recording material comprising at least one layer of which the primary sensitivity is blue, another layer of which the primary sensitivity is green and a further layer of which the primary sensitivity is red, which layers contain the particular color couplers coupling complementarily thereto and of which the IIE is at least 5% in the blue-sensitive and in the red-sensitive layer and at least 10% in the green-sensitive layer, characterized in that a red secondary sensitivity is produced in at least one layer, of which the primary sensitivity is green, and in at least one layer, of which the primary sensitivity is blue, the primary sensitivity being 8 to 25 DIN higher than the secondary sensitivity in either case.
Claim 3
Dependent Claim
26 words
A color photographic recording material as claimed in claim 1, characterized in that the sensitivity difference between primary and secondary sensitivity is 12 to 20 DIN.
Claim 4
Dependent Claim
44 words
A color photographic recording material as claimed in claim 1, characterized in that the secondary sensitivities are so established that, in addition to AgX-grains of primary spectral sensitivity, AgX-grains sensitized to primary and secondary spectral sensitivity are present in one and the same layer.
Claim 5
Dependent Claim
38 words
A color photographic recording material as claimed in claim 1, characterized in that, with a double-layer or multilayer arrangement of the color-sensitive layers, the spectral secondary sensitivity is established in the silver halide emulsion layer of lowest sensitivity.
Claim 6
Dependent Claim
78 words
A color photographic recording material as claimed in claim 1, characterized in that a blue secondary sensitivity is additionally produced in at least one layer, of which the primary sensitivity is red, and a green secondary sensitivity is additionally produced in at least one layer, of which the primary sensitivity is blue, and in at least one layer, of which the primary sensitivity is red, the primary sensitivity being 8 to 25 DIN higher than the secondary sensitivity.
Claim 7
Dependent Claim
66 words
A color negative material as claimed in claim 1, characterized in that the red sensitivity in the green-sensitive layer differs from the red secondary sensitivity in the blue-sensitive layer by no more than 3 DIN and in that the magenta and yellow secondary degradations obtained with red exposure differ by no more than 25% from one another within an exposure range of at least 5 DIN.
Claim 8
Dependent Claim
65 words
A color negative material as claimed in claim 6, characterized in that the red sensitivity in the green-sensitive layer differs from the red sensitivity in the blue-sensitive layer by no more than 1 DIN and in that the magenta and yellow secondary degradations obtained with red exposure differ by no more than 25% from one another within an exposure range of at least 10 DIN.
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |