US3600390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel 5-phenyl imidazolidino(5,1-a)5h-quinazolines and process therefor
Assignee: Merck Sharp & Dohme LLC
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Filing: 1968-07-01
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Granted: 1971-08-17
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Expires: 1988-07-01
Abstract
Abstract THIS INVENTION RELATES TO CERTAIN 5-PHENYLIMIDAZOLIDINO (5,1-B) 5H-QUINAZOLINES, THE (5,1-A)ISOMERS THEREOF AND TO THEIR USE AS BRONCHODILATING AGENTS.
Inventors
- 👤 Margaret H Sherlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C07D487/10
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |