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US3479355A
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US
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1,2,8,9-tetraazaphenalenes
Assignee: Novartis Corp
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Filing: 1968-10-15
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Granted: 1969-11-18
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Expires: 1988-10-15
Abstract
No abstract record available.
Inventors
- 👤 Karl J Doebel
- 👤 John E Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:38
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/06; C07C; C07C65/00; C07C65/30; C07C65/32; C07C65/42; C07D307/00; C07D307/77; C07D307/87; C07D307/89
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) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |