Patent US2269234A successfully refreshed from Google Patents.
US2269234A
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Polymethine dye intermediates
Assignee: Eastman Kodak Co
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Filing: 1940-10-18
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Granted: 1942-01-06
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Expires: 1960-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:02
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/54; C07D263/56; C07D215/00; C07D215/02; C07D215/12; C07D215/14; C07D263/60; C07D277/00; C07D277/02; C07D277/08; C07D277/10; C07D277/60; C07D277/62; C07D277/64; C07D277/84; C07D293/00; C07D293/10; C07D293/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-05 | 1945-07-07 | 1946-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-05 | 1949-07-07 | 1950-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-05 | 1953-07-07 | 1954-01-06 | $7700.00 | Window Closed / Lapsed |