US3062848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for 21-acyloxylation of 20-keto steroids and intermediates therefor
Assignee: Sanofi Aventis France
•
Filing: 1960-07-25
•
Granted: 1962-11-06
•
Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Joly Robert
- 👤 Jolly Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:38
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
21 - DIIODO - 9A-FLUORO-16A-METHYL-$1,4-PREGNADIENE11B,17A-DIOL-3,20-DIONE.
Claim 2
Dependent Claim
5 words
21 - DIIODO - 9A-FLUORO-16A-METHYL-$1,4-PREGNADIENE11B,17A-DIOL-3,20-DIONE.
Claim 3
Dependent Claim
17 words
A PROCESS FOR THE PRODUCTION OF 21-ACYLOXY-20-KETO STEROIDS OF THE PREGNANE AND ALLOPREGNANE SERIES HAVING THE FORMULA
Claim 4
Dependent Claim
17 words
A PROCESS FOR THE PRODUCTION OF 21-ACYLOXY-20-KETO STEROIDS OF THE PREGNANE AND ALLOPREGNANE SERIES HAVING THE FORMULA
References Cited (Backward Citations)
US2884429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |