US3738989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L-3-hydroxy-6-oxo-n-cyclopropylmethylmorphinans
Assignee: Shionogi and Co Ltd
•
Filing: 1971-06-29
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Granted: 1973-06-12
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Expires: 1991-06-29
Abstract
Abstract A L-3-HYDROXY-6-OXOMORPHINAN COMPOUND REPRESENTED BY THE FORMULA: 10A-R,11-R2,6-HO,3-(O=)-1,2,3,9,10,10A-HEXAHYDRO-4H-10, 4A-IMINOETHANOPHENANTHRENE WHERE F IS C1,C2 WHEREIN R REPRESENTS A HYDROGEN ATOM OR A HYDROXYL GROUP, R1 REPRESENTS A CYCLOPROPYLMETHYL GROUP AND F REPRESENTS THE PRESENCE OR ABSENCE OF A DOUBLE BOND, BEING USEFUL AS A NARCOTIC ANTAGONIST, IS PREPARED BY INTRODUCING THE SUBSTITUENT AT THE N-POSITION.
Inventors
- 👤 H Tada
- 👤 Y Sawa
- 👤 R Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:06
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/22; C07D221/28
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |