US3033862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 19-nor-progesterone and 6, 19-oxido and lactone intermediates therein
Assignee: Syntex SA
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Filing: 1960-07-28
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Granted: 1962-05-08
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Expires: 1980-07-28
Abstract
No abstract record available.
Inventors
- 👤 Howard J Ringold
- 👤 Bowers Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
C; C07; C07J; C07J75/00; C07J53/00; C07J53/002; C07J53/004
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A COMPOUND OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND OF THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
33 words
IN THE PROCESS OF PRODUCING 19-NOR-PROGESTERONE THE STEPS COMPRISING CONDENSING A 6B-HYDROXY-5A-PREGNANE WITH LEAD TETRAACETATE TO FORM A 6B,19-OXIDO-5A-PREGNANE AND THEN OXIDIZING WITH CHROMIUM TRIOXIDE TO FORM THE CORRESPONDING 6,19-LACTONE OF 5A-PREGNANE-6-B-OL-19-CARBOXYLIC ACID.
Claim 4
Dependent Claim
33 words
IN THE PROCESS OF PRODUCING 19-NOR-PROGESTERONE THE STEPS COMPRISING CONDENSING A 6B-HYDROXY-5A-PREGNANE WITH LEAD TETRAACETATE TO FORM A 6B,19-OXIDO-5A-PREGNANE AND THEN OXIDIZING WITH CHROMIUM TRIOXIDE TO FORM THE CORRESPONDING 6,19-LACTONE OF 5A-PREGNANE-6-B-OL-19-CARBOXYLIC ACID.
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |