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Patent US2727907A successfully refreshed from Google Patents.
US2727907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 16-alkanoyloxy-17alpha-hydroxypregnen-20-ones
Assignee: GD Searle LLC
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Filing: 1953-11-19
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Granted: 1955-12-20
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Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Leland J Chinn
- 👤 Lawrence E Thielen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:48
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS OF PREPARING A PREGNENE OF THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
10 words
THE PROCESS OF PREPARING A PREGNENE OF THE STRUCTURAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-19 | 1959-06-20 | 1959-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-19 | 1963-06-20 | 1963-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-19 | 1967-06-20 | 1967-12-20 | $7700.00 | Window Closed / Lapsed |