US3028237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masking of cyan images in color photography
Assignee: Agfa Gevaert NV
•
Filing: 1958-04-08
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Granted: 1962-04-03
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Expires: 1978-04-08
Abstract
No abstract record available.
Inventors
- 👤 Loffler Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN THE PROCESS FOR THE PRODUCTION OF A CYAN PHOTOGRAPHIC IMAGE WITH A RED CORRECTING MASK, THE STEPS OF PROVIDING A SILVER HALIDE EMULSION LAYER CONTAINING A CYAN COUPLER SELECTED FROM THE CLASS CONSISTING OF PHENOLS AND NAPHTOLS THAT COUPLE WITH THE OXIDATION PRODUCTS OF A PRIMARY AROMATIC AMINE DEVELOPER IN A POSITION ORTHO- AND PARA- TO THE PHENOLIC HYDROXY GROUP OF THE COUPLER TO FORM A CYAN DYE, AND A DIAMINE OF GENERAL FORMULA
Claim 2
Dependent Claim
75 words
IN THE PROCESS FOR THE PRODUCTION OF A CYAN PHOTOGRAPHIC IMAGE WITH A RED CORRECTING MASK, THE STEPS OF PROVIDING A SILVER HALIDE EMULSION LAYER CONTAINING A CYAN COUPLER SELECTED FROM THE CLASS CONSISTING OF PHENOLS AND NAPHTOLS THAT COUPLE WITH THE OXIDATION PRODUCTS OF A PRIMARY AROMATIC AMINE DEVELOPER IN A POSITION ORTHO- AND PARA- TO THE PHENOLIC HYDROXY GROUP OF THE COUPLER TO FORM A CYAN DYE, AND A DIAMINE OF GENERAL FORMULA
References Cited (Backward Citations)
US2697662A
Cited
US2805158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |