US3006759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-equivalent magenta-forming couplers for color photography
Assignee: Eastman Kodak Co
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Filing: 1959-08-03
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Granted: 1961-10-31
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Expires: 1979-08-03
Abstract
No abstract record available.
Inventors
- 👤 Loria Anthony
- 👤 Warren A Reckhow
- 👤 Ilmari F Salminen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:16
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/04; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/26; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A METHOD OF PRODUCING A MAGENTA-COLORED IMAGE IN AN EXPOSED PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER BY DEVELOPING SAID EMULSION LAYER WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A NOVEL MAGENTA-FORMING COUPLER HAVING THE FORMULA:
Claim 2
Independent Claim
38 words
A METHOD OF PRODUCING A MAGENTA-COLORED IMAGE IN AN EXPOSED PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER BY DEVELOPING SAID EMULSION LAYER WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A NOVEL MAGENTA-FORMING COUPLER HAVING THE FORMULA:
References Cited (Backward Citations)
US2600788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |