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US2459149A
Expired / Lapsed
US
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Anthraquinone compounds
Assignee: Eastman Kodak Co
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Filing: 1945-06-01
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Granted: 1949-01-18
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Expires: 1965-06-01
Abstract
No abstract record available.
Inventors
- 👤 Harry W Coover
- 👤 Joseph B Dickey
- 👤 Edmund B Towne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:21
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2326047A
Cited
US2242760A
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US2210517A
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US2338908A
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US2357176A
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US2353108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |