US3780040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-substituted-3,4-dihydroquinazolines
Assignee: Individual
•
Filing: 1972-06-02
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Granted: 1973-12-18
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Expires: 1992-06-02
Abstract
Abstract THE 2-SUBSTITUTED-3,4,-DIHYDROQUINAZOLINES AND THEIR PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS ARE USEFUL ANTIHYPERTENSIVE AGENTS. A COMPOUND DISCLOSED IS 2-(N(N'' - 2 - THIENOYLPIPERAZINO)) -3,4 - DIHYDROQUINAZOLINE HYDROIODIDE HYDRATE.
Inventors
- 👤 J Suh
- 👤 R Schnettler
- 👤 B Deer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:29
CPC Classifications
C; C07; C07D; C07D409/00; C07D409/02; C07D409/06
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |