US3635979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain 6- and/or 7-alkoxy-substituted-2 4-bis(disubstituted amino) quinazolines
Assignee: Pfizer Inc
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Filing: 1969-09-29
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Granted: 1972-01-18
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Expires: 1989-09-29
Abstract
Abstract NOVEL 2,4-DIAMINOQUINAZOLINES AND ACID ADDITION SALTS THEREOF, THEIR PREPARATION, AND THEIR USE AS HYPOTENSIVE AGENTS.
Inventors
- 👤 Hans-Jurgen E Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/14; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; C07D239/00; C07D239/70; C07D239/72; C07D239/95
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |