US3637700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain trialkoxy-substituted 4-aminoquinazoline nitrates
Assignee: Sandoz AG
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Filing: 1970-11-13
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Granted: 1972-01-25
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Expires: 1990-11-13
Abstract
Abstract DISCLOSED ARE COMPOUNDS OF THE CLASS OF QUINAZOLINES SUBSTITUTED IN THE BENZENE RING PORTION OF THE QUINAZOLINE BY TRIALKOXY AND FURTHER SUBSTITUTED AT THE 4-POSITION BY AN AMINO FUNCTION BEARING A HYDROXYALKYL NITRATE MOIETY, E.G., 4-(5-HYDROXYPENTYL) AMINO-6,7,8-TRIMETHOXYQUINAZOLINE NITRATE. THE COMPOUNDS HAVE PHARMACOLOGICAL ACTIVITY IN ANIMALS AND ARE USEFUL, FOR EXAMPLE, AS HYPOTENSIVE, CORONARY DILATORS AND ANTIANGINAL AGENTS. ALSO DISCLOSED ARE THE CORRESPONDING HYDROXY INTERMEDIATES USEFUL IN PREPARATION OF THE NITRATES.
Inventors
- 👤 Lloyd P Gabel
- 👤 William R J Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:14
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/02; C07D403/04; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/94
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |