US2884325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a yellow mask image in magenta-colored photographic images
Assignee: Agfa Gevaert NV
•
Filing: 1955-03-03
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Granted: 1959-04-28
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Burgardt Lothar
- 👤 Reckziegel Erich
- 👤 Wahl Ottmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:49
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR THE PRODUCTION OF A YELLOW MASKING IMAGE FOR A MAGENTA-COLORED IMAGE COMPRISING DEVELOPING AN IMAGEWISE-EXPOSED SILVER HALIDE EMULSION LAYER, CONTAINING A MAGENTA COLOUR-FORMING COUPLER HAVING AN ACTIVE METHYLENE GROUP, WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT TO FORM A MEGENTA DYE IMAGE, AND REACTING THE RESIDUAL COLOR-FORMING COUPLER WITH AN ALDEHYDE TO PRODUCE A YELLOW STYRYL DYESTUFF MASKING IMAGE, SAID SLDEHYDE BEING SELECTED FROM THE GROUP CONSISTING OF PYRROLEADLDSHYDES, INDOLE-ALDEHYDES, CARBAZOLE ALDEHYDES AND ANILS THEROF.
Claim 2
Dependent Claim
78 words
A PROCESS FOR THE PRODUCTION OF A YELLOW MASKING IMAGE FOR A MAGENTA-COLORED IMAGE COMPRISING DEVELOPING AN IMAGEWISE-EXPOSED SILVER HALIDE EMULSION LAYER, CONTAINING A MAGENTA COLOUR-FORMING COUPLER HAVING AN ACTIVE METHYLENE GROUP, WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT TO FORM A MEGENTA DYE IMAGE, AND REACTING THE RESIDUAL COLOR-FORMING COUPLER WITH AN ALDEHYDE TO PRODUCE A YELLOW STYRYL DYESTUFF MASKING IMAGE, SAID SLDEHYDE BEING SELECTED FROM THE GROUP CONSISTING OF PYRROLEADLDSHYDES, INDOLE-ALDEHYDES, CARBAZOLE ALDEHYDES AND ANILS THEROF.
References Cited (Backward Citations)
US1781966A
Cited
US1954452A
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US1898445A
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US2252718A
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US2304939A
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US2663638A
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US2704709A
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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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |