US3637668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-substituted 4-aminosteroids
Assignee: Bayer Pharma AG
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Filing: 1969-02-27
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Granted: 1972-01-25
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Expires: 1989-02-27
Abstract
Abstract 4-AMINOSTEROIDS OF THE PARTIAL FORMULA 1-(R1-N(-R2)-),2-(O=)-2,3,3A,4-TETRAHYDROPENTALENE WHEREIN R1 AND R2 ARE ALKYL OR SUBSTITUTED ALKYL AND WHEREIN R1 AND R2 TOGETHER WITH THE NITROGEN WHICH IS ATTACHED IN THE 4-POSITION, MAY FORM AN ADDITIONAL RING AND WHEREIN SAID ADDITIONAL RING MAY INCLUDE A FURTHER HETERO ATOM OR A POSITIVE NITROGEN AND WHEREIN ST IS A STEROID MOLECULE RESIDUE. THE COMPOUNDS HAVE PARTICULAR USE AS PROGESTATIONAL AGENTS. THE COMPOUNDS OF THE ANDROSTANE SERIES HAVE ANDROGENOUS, ANABOLIC AND ANTIESTROGENIC PROPERTIES.
Inventors
- 👤 Henry Laurent
- 👤 Hermann Steinbeck
- 👤 Rudolf Weichert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; A61K31/573; A61K31/58
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |