US3752807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of novel orally effective cardio active cardenolides
Assignee: Warner Lambert Co LLC
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Filing: 1972-02-09
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Granted: 1973-08-14
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Expires: 1992-02-09
Abstract
Abstract WHEREIN R1 MEANS HYDROGEN, AN ALKYL, ALKOXYALKYL, ACYL, AROYL, A TETRAHYDROPYRANOSYL, OR A GLYCOSYL RESIDUE, THE LATTER TWO BEING SUBSTITUTED IF DESIRED. THESE COMPOUNDS WHEN TAKEN ORALLY PRODUCE A CARDIOTONIC EFFECT. DIHYDROFUR-4-YL)-ESTRANE 3-(R1-O-),5,10-(-O-C(-CH3)2-O-),14-HO,17-(2-(O=)-2,5- THE PRESENT APPLICATION RELATES TO COMPOUNDS OF THE GENERAL FORMULA I
Inventors
- 👤 J Hartenstein
- 👤 G Satzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:00
CPC Classifications
C; C07; C07J; C07J75/00
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |