Patent US4133686A successfully refreshed from Google Patents.
US4133686A
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US
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Color photographic light-sensitive element
Assignee: Fujifilm Holdings Corp
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Filing: 1977-10-27
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Granted: 1979-01-09
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Expires: 1997-10-27
Abstract
Abstract A color photographic light-sensitive element comprising a support having thereon a silver halide emulsion layer containing therein a 3-anilino-2-pyrazolin-5-one magenta color forming coupler, which prevents yellow staining at the unexposed areas after color development processing, and which particularly prevents an increase in yellow staining due to irradiation of light with the magenta color images obtained using the color photographic element containing the magenta coupler maintaining a clear color even after irradiation of light.
Inventors
- 👤 Seiji Ichijima
- 👤 Nobuo Furutachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:19
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
A color photographic light-sensitive element comprising a support having thereon a silver halide emulsion layer containing therein a 3-anilino-2-pyrazolin-5-one magenta color forming coupler represented by the general formula (II): ##STR10## wherein R represents an alkyl group and Z represents a hydrogen atom.
Claim 2
Dependent Claim
42 words
A color photographic light-sensitive element comprising a support having thereon a silver halide emulsion layer containing therein a 3-anilino-2-pyrazolin-5-one magenta color forming coupler represented by the general formula (II): ##STR10## wherein R represents an alkyl group and Z represents a hydrogen atom.
Claim 3
Dependent Claim
22 words
The color photographic light-sensitive element of claim 1, wherein said silver halide emulsion layer is a green sensitive silver halide emulsion layer.
Claim 4
Dependent Claim
73 words
The color photographic light-sensitive element of claim 1, wherein said silver halide emulsion layer is a green sensitive silver halide emulsion layer containing said magenta color forming coupler represented by the general formula (I) and said color photographic light-sensitive element additionally includes a red sensitive silver halide emulsion layer containing a phenolic or naphtholic cyan color forming coupler, and a blue sensitive silver halide emulsion layer containing an acylacetamido yellow color forming coupler.
Claim 5
Dependent Claim
22 words
The color photographic light-sensitive element of claim 1, wherein said silver halide emulsion layer contains a p-oxyphenol derivative or a hydroquinone compound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |