US2795594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11-oxygenated-4, 17 (20)-pregnadien-21-al-20-ol-3-one and its derivatives
Assignee: Merck and Co Inc
•
Filing: 1956-04-25
•
Granted: 1957-06-11
•
Expires: 1976-04-25
Abstract
No abstract record available.
Inventors
- 👤 Roger E Beyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:23
CPC Classifications
C; C07; C07J; C07J13/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
A PROCESS WHICH COMPRISES REACTING 11-OXYGENATED4-PREGNEN-21-AL-3,20-DIONE WITH AN ENOLIZING AGENT COMPRISING AN ORGANIC CARBOXYLIC ACID CONTAINING LESS THAN SEVEN CARBON ATOMS AND A TERTIARY-AMINE TO PRODUCE 11OXYGENATED-4,17(20)-PREGNADIEN-21-AL-20-OL-3-ONE,
Claim 2
Dependent Claim
27 words
A PROCESS WHICH COMPRISES REACTING 11-OXYGENATED4-PREGNEN-21-AL-3,20-DIONE WITH AN ENOLIZING AGENT COMPRISING AN ORGANIC CARBOXYLIC ACID CONTAINING LESS THAN SEVEN CARBON ATOMS AND A TERTIARY-AMINE TO PRODUCE 11OXYGENATED-4,17(20)-PREGNADIEN-21-AL-20-OL-3-ONE,
References Cited (Backward Citations)
US2732384A
Cited
US2563247A
Cited
US2577018A
Cited
US2683153A
Cited
US2684376A
Cited
US2708202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |