US2880214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
17alpha acetoxy pregnane and pregnene compounds
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-01-19
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Granted: 1959-03-31
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Expires: 1973-01-19
Abstract
No abstract record available.
Inventors
- 👤 Robert B Moffett
- 👤 Hugh V Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:41
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND OF THE 17A-ACETOXY-20-KETOPREGNANE SERIES WHICH COMPRISES: RE ACTING A COMPOUND OF THE 17A-HYDROXY-20-KETOPREGNANE SERIES WITH AN ACETYLATING AGENT, IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF MINERAL ACIDS AND BENZENE-SULFONIC ACIDS AT A TEMPERATURE BETWEEN ABOUT 65 DEGREES CENTIGRADE AND THE REFLUX TEMPERATURE OF THE MIXTURE TO PRODUCE THE CORRESPONDING 17A-ACETOXY-20KETOPREGNANE.
References Cited (Backward Citations)
US2239012A
Cited
CH236013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |