Patent US3787430A successfully refreshed from Google Patents.
US3787430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of dipyrazolo(3,4-b;3',4'-d)pyridines
Assignee: ER Squibb and Sons LLC
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Filing: 1972-07-13
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Granted: 1974-01-22
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Expires: 1992-07-13
Abstract
Abstract THEY AND SALTS THEREOF ARE USEFUL AS CENTRAL NERVOUS SYSTEM DEPRESSANTS. THESE COMPOUNDS ALSO INCREASE THE INTRACELLULAR CONCENTRATION OF ADENOISINE 3'',5''-CYCLIC MONOPHOSPHATE. 1-R3,3-R4,4-R5,6-R1,8-R2-DIPYRAZOLO(3,4-B:3'',4''-D)PYRIDINE NEW DERIVATIVES OF DIPYRAZOLO(3,4-B; 3'',4''-D)PYRIDINES HAVE THE GENERAL FORMULA
Inventors
- 👤 H Hoehn
- 👤 T Denzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:46
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/38; C07D471/00; C07D471/02; C07D471/04
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |