US3637701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain nitrate derivatives of 4-aminoquinazolines
Assignee: Sandoz AG
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Filing: 1969-06-26
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Granted: 1972-01-25
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Expires: 1989-06-26
Abstract
Abstract THE INVENTION DISCLOSED COMPOUNDS OF THE CLASS WHICH ARE NITRATES OF 4-SUBSTITUTED-AMINO-QUINAZOLINES, E.G., 4(2-HYDROXYETHYL)AMINO-6,7-DIMETHOXYQUINAZOLINE NITRATE, HAVING PHARMACOLOGICAL ACTIVITY IN ANIMALS AND USEFUL, FOR EXAMPLE, AS HYPOTENSIVE AND ANTI-ANGINAL AGENTS. ALSO DISCLOSED ARE THE HYDROXY INTERMEDIATES USEFUL IN PREPARATION OF SAID NITRATES.
Inventors
- 👤 Lloyd P Gabel
- 👤 William R J Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:01
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/04
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) | 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 |