US3034892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magenta-colored cyan-forming couplers
Assignee: Eastman Kodak Co
•
Filing: 1958-10-27
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Granted: 1962-05-15
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Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Gledhill
- 👤 Williams John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335; G03C7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PHOTOGRAHIC SILVER HALIDE EMULSION CONTAINING A MAGENTA-COLORED CYAN-FORMING COUPLER COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
21 words
A PHOTOGRAHIC SILVER HALIDE EMULSION CONTAINING A MAGENTA-COLORED CYAN-FORMING COUPLER COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
References Cited (Backward Citations)
US1975611A
Cited
US2584349A
Cited
US2521908A
Cited
US2756225A
Cited
US2725291A
Cited
US2706684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |