US2474426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanine dyestuffs and dyestuff intermediates
Assignee: Ilford Imaging UK Ltd
•
Filing: 1942-08-20
•
Granted: 1949-06-28
•
Expires: 1962-08-20
Abstract
No abstract record available.
Inventors
- 👤 Kendall John David
- 👤 Suggate Harold Gordon
- 👤 Wood Henry Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:07
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1969444A
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US1861836A
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US1950876A
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US1957869A
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US2027031A
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US2138223A
Cited
GB511940A
Cited
US2307916A
Cited
US2238031A
Cited
US2265909A
Cited
US2323503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |