US3822260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-(cyanophenyl)-4,5-dihydro-3(2h)-pyridazinones
Assignee: Wyeth Holdings LLC
•
Filing: 1972-06-05
•
Granted: 1974-07-02
•
Expires: 1992-06-05
Abstract
Abstract THIS DISCLOSURE DESCRIBES COMPOUNDS OF THE CLASS OF 6-(O, M-, OR P-CYANOPHENYL)-4,5-DIHYDRO-3-(2H) - PYRIDAZINONES USEFUL AS HYPOTENSIVE AGENTS.
Inventors
- 👤 W Curran
- 👤 Ross A Schneller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:58
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |