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US3499013A
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3-oxygenated 21beta-hydrocarbonsulfonyl-pregna-17(20),20-dienes,dehydro and 19-nor derivatives thereof and intermediates thereto
Assignee: GD Searle LLC
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Filing: 1968-11-04
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Granted: 1970-03-03
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Expires: 1988-11-04
Abstract
No abstract record available.
Inventors
- 👤 Walter R Benn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:39
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; A61K31/573; A61K31/565; A61K31/568; A61K31/569; C; C07; C07J; C07J31/00; C07J75/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3109850A
Cited
US3032563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |