Patent US3152154A successfully refreshed from Google Patents.
US3152154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
17-monoesters of 17alpha, 21-dihydroxy steroids and process for the preparation thereof
Assignee: Francesco Vismara SpA
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Filing: 1962-06-11
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Granted: 1964-10-06
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Ercoli Alberto
- 👤 Gardi Rinaldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
C; C07; C07J; C07J21/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
THE PROCESS FOR PREPARING A 17 A-ACYLOXY-21-HYDROXY20-KETO-PREGNANE HAVING AT THE 17-POSITION THE STRUCTURE:
Claim 2
Dependent Claim
13 words
THE PROCESS FOR PREPARING A 17 A-ACYLOXY-21-HYDROXY20-KETO-PREGNANE HAVING AT THE 17-POSITION THE STRUCTURE:
Claim 3
Dependent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A STEROID COMPOUND OF THE FORMULA:
Claim 4
Dependent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A STEROID COMPOUND OF THE 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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |