US3833588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated-substituted tricyclic quinazolinones
Assignee: Sandoz AG
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Filing: 1973-03-02
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Granted: 1974-09-03
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Expires: 1993-03-02
Abstract
Abstract THE COMPOUNDS ARE PHARMACOLOGICALLY ACTIVE TRICYCLIC QUINAZOLINONES OF THE CLASS OF IMIDAZO 2,1-B!QUINAZOLIN5 - ONES PYRIMIDO 2,1 - B!QUINAZOLIN - 6 - ONES AND DIAZEPINO 2,1 - B!QUINAZOLINE - 7 - ONES, BEARING AN UNSATURATED SUBSTITUENT ON THE AVAILABLE MITROGEN OF THE QUINAZOLINOONE PORTION AND USEFUL, FOR EXAMPLE, AS ANTI-INFLAMMATORY AND BRONCHODILATOR AGENTS. PROCESSES FOR PREPARATION OF SAID COMPOUNDS INCLUDE THE REACTION OF A N-CARBOXY-ANTHRANILIC ANHYDRIDE (AN ISOTOIC ANHYDRIDE) WITH A CYCLIC PSEUDOTHIOUREA SUCH AS 2 - ORGANOMERCAPTO4,5 - DIHYDROIMIDAZOLE OR 2 - ORGANOMERCAPTO - 3,4,5,6TETRAHYDROPYRIMIDINE.
Inventors
- 👤 G Hardtmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |