Patent US2998314A successfully refreshed from Google Patents.
US2998314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photography
Assignee: Agfa Gevaert NV
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Filing: 1957-09-04
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Granted: 1961-08-29
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Puschel Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:42
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/54; C07D231/56; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/26; C07D231/44; C07D231/52; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN THE PROCESS OF PRODUCING COLOR PHOTOGRAPHIC IMAGES IN EXPOSED SILVER HALIDE EMULSION LAYERS BY DEVELOPING THE EMULSION WITH A COLOR FORMING DEVELOPER HAVING A PRIMARY AMINO GROUP IN THE PRESENCE OF A COLOR COUPLER HAVING AN ACTIVATED METHYLENE THAT REACTS WITH THE OXIDATION PRODUCTS OF THE DEVELOPER TO FORM A DYE, THE IMPROVEMENT ACCORDING TO WHICH THE DEVELOPMENT IS CARRIED OUT IN THE FURTHER PRESENCE OF A SUPPLEMENTAL COUPLER HAVING THE ACTIVATED METHYLENE STRUCTURE OF A COLOR COUPLER, BUT IN WHICH STRUCTURE THE METHYLENE IS SUBSTITUTED WITH A RADICAL SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ARYL AND ARALKYL RADICALS TO CAUSE THE SUPPLEMENTAL COUPLER TO COUPLE WITH SAID OXIDATION PRODUCTS TO FORM A SUBSTANTIALLY COLORLESS COUPLING PRODUCT AND THEREBY PREVENT THE FORMATION OF SOME OF THE COLOR, SAID SUPPLEMENTAL COUPLER BEING SUCH THAT WITHOUT SAID SUBSTITUTION IT WOULD COUPLE WITH SAID OXIDATION PRODUCTS TO FORM A DYE.
Claim 2
Dependent Claim
150 words
IN THE PROCESS OF PRODUCING COLOR PHOTOGRAPHIC IMAGES IN EXPOSED SILVER HALIDE EMULSION LAYERS BY DEVELOPING THE EMULSION WITH A COLOR FORMING DEVELOPER HAVING A PRIMARY AMINO GROUP IN THE PRESENCE OF A COLOR COUPLER HAVING AN ACTIVATED METHYLENE THAT REACTS WITH THE OXIDATION PRODUCTS OF THE DEVELOPER TO FORM A DYE, THE IMPROVEMENT ACCORDING TO WHICH THE DEVELOPMENT IS CARRIED OUT IN THE FURTHER PRESENCE OF A SUPPLEMENTAL COUPLER HAVING THE ACTIVATED METHYLENE STRUCTURE OF A COLOR COUPLER, BUT IN WHICH STRUCTURE THE METHYLENE IS SUBSTITUTED WITH A RADICAL SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ARYL AND ARALKYL RADICALS TO CAUSE THE SUPPLEMENTAL COUPLER TO COUPLE WITH SAID OXIDATION PRODUCTS TO FORM A SUBSTANTIALLY COLORLESS COUPLING PRODUCT AND THEREBY PREVENT THE FORMATION OF SOME OF THE COLOR, SAID SUPPLEMENTAL COUPLER BEING SUCH THAT WITHOUT SAID SUBSTITUTION IT WOULD COUPLE WITH SAID OXIDATION PRODUCTS TO FORM A DYE.
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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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |