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US2655516A
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3-beta-acyloxy-5, 7, 9 (11)-pregnatrien-12, 20-diones
Assignee: Pharmacia and Upjohn Co
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Filing: 1951-05-24
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Granted: 1953-10-13
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Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Robert H Levin
- 👤 Jr A Vern Mcintosh
- 👤 George B Spero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:57
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
3-BETA-ACYLOXY-5,7,9(11)-PREGNATRIEN12,20-DIONE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
5 words
3-BETA-ACYLOXY-5,7,9(11)-PREGNATRIEN12,20-DIONE REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
GB594873A
Cited
US2447325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |