US2806030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclopentanophenanthrene derivatives and process for the preparation thereof
Assignee: Syntex SA
•
Filing: 1955-03-16
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Granted: 1957-09-10
•
Expires: 1975-03-16
Abstract
No abstract record available.
Inventors
- 👤 Howard J Ringold
- 👤 Rosenkranz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:14
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR THE PRODUCTION OF $4-19 NOR-17AETHINYL-ANDROSTENE-17B-OL-3-ONE COMPRISING REACTING A 3LOWER ALKOXY-19-NOR-$2,5(10)-ANDSROSTADIENE-17B-OL WITH ETHYLENE GLYCOL IN THE PRESENCE OF AN ACID CATALYST TO FORM THE CORRESPONDING 3-ETHYLENE-KETAL OF 19-NOR-TESTOSTERONE,, TREATING THE AFORSAID KETAL WITH CHROMIC ACID TO FROM THE 3-ETHYGLENE-KETAL OF 19-NOR-ANDROSTENEDIONE, AND THE PRESENCE OF A POTASSIUM ALKOXIDE FOLLOWED BY ACID THE PRESENCE OF A POTASSIUM ALKOXIDE FOLLOWED BY ACID HYDROLYSIS.
Claim 2
Dependent Claim
63 words
A PROCESS FOR THE PRODUCTION OF $4-19 NOR-17AETHINYL-ANDROSTENE-17B-OL-3-ONE COMPRISING REACTING A 3LOWER ALKOXY-19-NOR-$2,5(10)-ANDSROSTADIENE-17B-OL WITH ETHYLENE GLYCOL IN THE PRESENCE OF AN ACID CATALYST TO FORM THE CORRESPONDING 3-ETHYLENE-KETAL OF 19-NOR-TESTOSTERONE,, TREATING THE AFORSAID KETAL WITH CHROMIC ACID TO FROM THE 3-ETHYGLENE-KETAL OF 19-NOR-ANDROSTENEDIONE, AND THE PRESENCE OF A POTASSIUM ALKOXIDE FOLLOWED BY ACID THE PRESENCE OF A POTASSIUM ALKOXIDE FOLLOWED BY ACID HYDROLYSIS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |