US3702849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-(isoquinolin-1-yl) piperazine-1-carboxylic acid esters
Assignee: Pfizer Inc
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Filing: 1970-03-17
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Granted: 1972-11-14
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Expires: 1990-03-17
Abstract
Abstract 4-(ISOQUINOLIN-1-YL)-PIPERAZINE-1-CARBOXYLIC ACID, ESTERS AND 1-AMINO-6,7-DIALKOXYISOQUINOLINES AND THEIR PHARMACEUTICALLY-ACCEPTABLE ACID ADDITION SALTS. COMPOUNDS MANIFEST BRONCHODILATOR ACTIVITY AND ANTIHYPERTENSIVE RESPONSE WITH MINIMAL ADVERSE EFFECTS UPON ADMINISTRATION TO AFFLICTED SUBJECTS.
Inventors
- 👤 Timothy H Cronin
- 👤 Hans-Jurgen E Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/94; C07D403/00; C07D403/02; C07D403/04
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |