US2455170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored couplers
Assignee: Eastman Kodak Co
•
Filing: 1944-05-03
•
Granted: 1948-11-30
•
Expires: 1964-05-03
Abstract
No abstract record available.
Inventors
- 👤 Dudley B Glass
- 👤 Paul W Vittum
- 👤 Arnold Weissberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:26
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335; Y; Y10; Y10S; Y10S56/00; Y10S56/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2213986A
Cited
US2220123A
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US2310943A
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US2308023A
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US2271230A
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US2262055A
Cited
US2369489A
Cited
US9334495B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |