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US2739984A
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Tetra-substituted diamino alkanes
Assignee: Novartis AG
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Filing: 1952-06-09
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Granted: 1956-03-27
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Expires: 1972-06-09
Abstract
No abstract record available.
Inventors
- 👤 Hafliger Franz
- 👤 Schindler Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:04
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2554736A
Cited
US2505133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |