US4963465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic negative recording material
Assignee: Agfa Gevaert AG
•
Filing: 1989-12-28
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Granted: 1990-10-16
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Expires: 2009-12-28
Abstract
Abstract Using a color photographic negative recording material which contains a most sensitive, a medium-sensitive and a least sensitive silver halide part layer for recording light from at least one of the spectral ranges of red, green and blue, at least one of the two more sensitive part layers containing a DIR coupler and the most sensitive partial layer and the least sensitive part layer containing a color coupler which couples faster than the color coupler in the medium-sensitive part layer by a factor of at least 1.5, the sharpness can be improved without impairing the color grain.
Inventors
- 👤 Reinhart Matejec
- 👤 Ralf Buscher
- 👤 Hans Langen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:40
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A colour photographic negative recording material containing at least one red-sensitive, at least one green-sensitive and at least one blue-sensitive silver halide emulsion layer each with assigned colour couplers for producing image dyestuffs of complementary colour to the spectral sensitivity, at least three part layers of different sensitivity being present for recording light from at least one of the spectral ranges of red, green and blue, that is to say a most sensitive, a medium-sensitive and a least sensitive part layer, at least one of the two more sensitive part layers of which contains a DIR compound, characterized in that the most sensitive and the least sensitive part layer contain a colour coupler which couples faster than the colour coupler in the medium-sensitive part layer by a factor of at least 1.5.
Claim 2
Dependent Claim
132 words
A colour photographic negative recording material containing at least one red-sensitive, at least one green-sensitive and at least one blue-sensitive silver halide emulsion layer each with assigned colour couplers for producing image dyestuffs of complementary colour to the spectral sensitivity, at least three part layers of different sensitivity being present for recording light from at least one of the spectral ranges of red, green and blue, that is to say a most sensitive, a medium-sensitive and a least sensitive part layer, at least one of the two more sensitive part layers of which contains a DIR compound, characterized in that the most sensitive and the least sensitive part layer contain a colour coupler which couples faster than the colour coupler in the medium-sensitive part layer by a factor of at least 1.5.
Claim 3
Dependent Claim
17 words
Recording material as claimed in claim 1, wherein the least sensitive part layer contains no DIR compound.
Claim 4
Dependent Claim
27 words
Recording material as claimed in any of claim 1, wherein the DIR compound contained in one of the two more sensitive part layers is a DIR coupler.
Claim 5
Dependent Claim
43 words
Recording material as claimed in claim 3, wherein the DIR coupler contained in one of the two more sensitive part layers differs in coupling rate from the colour coupler contained in the same part layer by a factor of not more than 5.
Claim 6
Dependent Claim
40 words
Recording material as claimed in claim 1, wherein the total silver halide coating weight of all the photosensitive layers, expressed by the equivalent amount of AgNO 3 , is not more than 10 g AgNO 3 per m 2 .
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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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |