US3419390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elements and developers for color photography utilizing phenolic couplers containingan aminoalkyl group on the coupling position
Assignee: Eastman Kodak Co
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Filing: 1965-10-04
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Granted: 1968-12-31
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Homer W J Cressman
- 👤 John R Thirtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:11
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; G; G03; G03C; G03C7/00; G03C7/18; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30523; G03C8/00; G03C8/02; G03C8/08; G03C8/10
Claims Analysis
Total Claims: 0
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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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |