US2733240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of ailqpreg-
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:27
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALLOPREGNAN-3B,17ADIOL-11,20-DIONE LOWER FATTY ACID ESTERS AND BENZOIC ACID ESTERS THEREOF WHICH COMPRISES TREATING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF &16-ALLOPREGNEN-3B-OL 11,20-DIONE LOWER FATTY ACID ESTERS AND BENZOIC ACID ESTERS THEREOF WITH HYDROGEN PEROXIDE IN ALKALINE MEDIUM TO FROM THE CORRESPONDING 16A, 17A-ODIDO COMPOUND, REACTING THE OXIDO COMPOUND WITH HYDROGEN BROMIDE TO FORM THE CORRESPONDING 19B-BROMO-17A-HYDROXY COMPOUND AND TREATING THE 19-BROMO-17A-HYDROXY COMPOUND WITH A DEBROMINATING AGENT.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALLOPREGNAN-3B,17ADIOL-11,20-DIONE LOWER FATTY ACID ESTERS AND BENZOIC ACID ESTERS THEREOF WHICH COMPRISES TREATING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF &16-ALLOPREGNEN-3B-OL 11,20-DIONE LOWER FATTY ACID ESTERS AND BENZOIC ACID ESTERS THEREOF WITH HYDROGEN PEROXIDE IN ALKALINE MEDIUM TO FROM THE CORRESPONDING 16A, 17A-ODIDO COMPOUND, REACTING THE OXIDO COMPOUND WITH HYDROGEN BROMIDE TO FORM THE CORRESPONDING 19B-BROMO-17A-HYDROXY COMPOUND AND TREATING THE 19-BROMO-17A-HYDROXY COMPOUND WITH A DEBROMINATING AGENT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |