Patent US5203208A successfully refreshed from Google Patents.
Patent US2908573A successfully refreshed from Google Patents.
US2908573A
Expired / Lapsed
US
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Photographic color couplers containing mono-n-alkyl groups
Assignee: Eastman Kodak Co
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Filing: 1956-07-25
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Granted: 1959-10-13
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Walter M Bush
- 👤 Ilmari F Salminen
- 👤 John R Thirtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A COLOR-FORMING PHOTOGRAPHIC EMULSION CONTAINING A COLOR-FORMING COMPOUND OF LOW DIFFUSIVITY, COMPRISING A GELATINO-SILVER HALIDE EMULSION CONTAINING A COLOR-FORMING COMPOUND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS HAVING THE STRUCTURE
Claim 2
Dependent Claim
30 words
A COLOR-FORMING PHOTOGRAPHIC EMULSION CONTAINING A COLOR-FORMING COMPOUND OF LOW DIFFUSIVITY, COMPRISING A GELATINO-SILVER HALIDE EMULSION CONTAINING A COLOR-FORMING COMPOUND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS HAVING THE STRUCTURE
References Cited (Backward Citations)
US2186849A
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US2425503A
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US2704711A
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US2652329A
Cited
US2721798A
Cited
US2808329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |