Patent US2428054A successfully refreshed from Google Patents.
US2428054A
Expired / Lapsed
US
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Photographic color correction using colored couplers
Assignee: Eastman Kodak Co
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Filing: 1945-08-30
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Granted: 1947-09-30
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Expires: 1965-08-30
Abstract
No abstract record available.
Inventors
- 👤 Paul W Vittum
- 👤 Rebecca J Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:11
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335; C; C21; C21D; C21D9/00; C21D9/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2193931A
Cited
US2340656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |