Patent US3835137A successfully refreshed from Google Patents.
US3835137A
Expired / Lapsed
US
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Fibrinolytic tetrazolo(1,5-c)quinazolines
Assignee: Dow Chemical Co
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Filing: 1972-10-13
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Granted: 1974-09-10
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Expires: 1992-10-13
Abstract
Abstract Tetrazoloquinazoline compounds such as 5-(4(dimethylamino)phenyl)-5,6-dihydro-tetrazolo(1,5-c)-quinazoline are prepared by the reaction of 5-(2-amino-phenyl)tetrazole with a 4-dialkylaminobenzaldehyde. The compounds are useful as fibrinolytic agents.
Inventors
- 👤 E Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:18
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
A compound of claim 1 wherein the compound is 5-(4-(dimethylamino)phenyl)-5,6-dihydro-tetrazolo-(1,5-c)-quinazoline hydrochloride.
References Cited (Backward Citations)
US3389137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |