US2688541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive color photographic material
Assignee: Imperial Chemical Industries Ltd
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Filing: 1951-11-13
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Granted: 1954-09-07
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Expires: 1971-11-13
Abstract
No abstract record available.
Inventors
- 👤 Ganguin Karl Otto
- 👤 Macdonald Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:23
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; H; H01; H01J; H01J13/00; H01J13/02; H01J13/48; H01J2893/00; H01J2893/0072; H01J2893/0073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A PHOTOGRAPHIC MATERIAL ADAPTED FOR USE IN COLOUR PHOTOGRAPHY WHICH COMPRISES THREE SUPERIMPOSED DIFFERENTLY SENSITIZED GELATINO-SILVER HALIDE EMULSION LAYERS, THE LAYERS COMPRISING A MIDDLE SENSITIVE LAYER BETWEEN TWO OUTERMOST SENSITIVE LAYERS; SAID LAYERS CONTAINING COLOUR FORMERS WHICH COUPLE WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPER TO FORM THE COLOR IMAGE AND ARE ADAPTED TO YIELD, UPON EXPOSURE AND DEVELOPMENT, YELLOW, CYAN AND MAGENTA COLOURED IMAGES IN SEPARATE LAYERS, SAID MATERIAL BEING CHARACTERIZED IN THAT ONE OF THE OUTERMOST SENSITIVE LAYERS IS SENSITIVE TO BLUE LIGHT AND IS ADJACENT TO, AND NOT SEPARATED BY A FILTER LAYER FROM, THE MIDDLE SENSITIVE LAYER, WHICH MIDDLE SENSITIVE LAYERS CONTAINS A WATER-SOLUBLE YELLOW STYRYL DYESTUFF CARRYING A SUBSTITUENT WHICH RENDERS THE DYESTUFF NON-DIFFUSIBLE AND OBTAINABLE BY CONDENSING A REACTIVE METHYLENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE PYRAZOLONE AND CYANOACETYL SERIES, WITH AN ANIL OF AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE AND ALKALISOLUBLE ALDEHYDES OF THE FORMULA:
Claim 2
Dependent Claim
162 words
A PHOTOGRAPHIC MATERIAL ADAPTED FOR USE IN COLOUR PHOTOGRAPHY WHICH COMPRISES THREE SUPERIMPOSED DIFFERENTLY SENSITIZED GELATINO-SILVER HALIDE EMULSION LAYERS, THE LAYERS COMPRISING A MIDDLE SENSITIVE LAYER BETWEEN TWO OUTERMOST SENSITIVE LAYERS; SAID LAYERS CONTAINING COLOUR FORMERS WHICH COUPLE WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPER TO FORM THE COLOR IMAGE AND ARE ADAPTED TO YIELD, UPON EXPOSURE AND DEVELOPMENT, YELLOW, CYAN AND MAGENTA COLOURED IMAGES IN SEPARATE LAYERS, SAID MATERIAL BEING CHARACTERIZED IN THAT ONE OF THE OUTERMOST SENSITIVE LAYERS IS SENSITIVE TO BLUE LIGHT AND IS ADJACENT TO, AND NOT SEPARATED BY A FILTER LAYER FROM, THE MIDDLE SENSITIVE LAYER, WHICH MIDDLE SENSITIVE LAYERS CONTAINS A WATER-SOLUBLE YELLOW STYRYL DYESTUFF CARRYING A SUBSTITUENT WHICH RENDERS THE DYESTUFF NON-DIFFUSIBLE AND OBTAINABLE BY CONDENSING A REACTIVE METHYLENE COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE PYRAZOLONE AND CYANOACETYL SERIES, WITH AN ANIL OF AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE AND ALKALISOLUBLE ALDEHYDES OF THE FORMULA:
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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |