US2983608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yellow-colored magenta-forming couplers
Assignee: Eastman Kodak Co
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Filing: 1958-10-06
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Granted: 1961-05-09
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Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 Leo E Beavers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A YELLOW-COLORED MAGENTA-FORMING COUPLER COMPOUND SELECTED FROM THOSE HAVING THE FORMULA:
Claim 2
Dependent Claim
17 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A YELLOW-COLORED MAGENTA-FORMING COUPLER COMPOUND SELECTED FROM THOSE HAVING 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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |