US3639612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chalcogen containing heterocyclics as an in vitro anti-viral agent
Assignee: Eli Lilly and Co
•
Filing: 1969-05-16
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Granted: 1972-02-01
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Expires: 1989-05-16
Abstract
Abstract DERIVATIVES OF TRICYCLIC CHALCOGEN CONTAINING HETEROCYCLES USEFUL AS ANTI-VIRAL AGENTS AND IN DIFFERENTIATING POLIO III FROM OTHER POLIO VIRUSES.
Inventors
- 👤 Donald C De Long
- 👤 Charles J Paget Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:56
CPC Classifications
C; C07; C07D; C07D327/00; C07D327/02; C07D327/06; C07D327/08; C07D319/00; C07D319/10; C07D319/14; C07D319/24; C07D339/00; C07D339/08
Claims Analysis
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |