Patent US3565944A successfully refreshed from Google Patents.
US3565944A
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Pharmaceutically active derivatives of ethanooctahydrophenanthrene
Assignee: EIDP Inc
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Filing: 1968-03-04
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Granted: 1971-02-23
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Expires: 1988-03-04
Abstract
Abstract THIS INVENTION TEACHES THAT NOVEL DISUBSTITUTED AND POLYSUBSTITUTED DERIVATIVES OF 2,4''-ETHANOOCTAHYDROPHENANTHRENE ARE USEFUL AS ANTIFERTILITY AGENTS WHEN ADMINISTERED TO ANIMALS.
Inventors
- 👤 Kyu Tai Lee
- 👤 Joel G Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:39
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/92; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |