US2426465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing n-vinyl carbazole
Assignee: General Electric Co
•
Filing: 1945-11-27
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Granted: 1947-08-26
•
Expires: 1965-11-27
Abstract
No abstract record available.
Inventors
- 👤 Harry F Miller
- 👤 Ralph G Flowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE256757C
Cited
US2378551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |