US2897202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-keto-4-aza-delta5-steroids and method of preparing same
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-03-19
•
Granted: 1959-07-28
•
Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 Bernard S Wildi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:49
CPC Classifications
C; C07; C07J; C07J73/00; C07J73/001; C07J73/005; C07J73/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
AS A NEW COMPOUND *5-4AZAPREGNEN-3,20-DIONE.
Claim 2
Dependent Claim
5 words
AS A NEW COMPOUND *5-4AZAPREGNEN-3,20-DIONE.
Claim 3
Dependent Claim
6 words
AS A NEW COMPOUND, *5-17 A-ACETOXY-4-AZA-TESTEN3-ONE.
Claim 4
Dependent Claim
6 words
AS A NEW COMPOUND, *5-17 A-ACETOXY-4-AZA-TESTEN3-ONE.
Claim 5
Independent Claim
13 words
A METHOD OF PREPARING 3-KETO-4-AZA-*5-STEROIDS WHICH COMPRISES HEATING A COMPOUND OF THE STRUCTURE:
Claim 6
Independent Claim
13 words
A METHOD OF PREPARING 3-KETO-4-AZA-*5-STEROIDS WHICH COMPRISES HEATING A COMPOUND OF THE STRUCTURE:
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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |