Patent US2659744A successfully refreshed from Google Patents.
US2659744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11 alpha, 17 alpha, 21-trihydroxyallopregnane and its esters
Assignee: Pharmacia and Upjohn Co
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Filing: 1952-10-01
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Granted: 1953-11-17
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Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 William P Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:06
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 11A,17A,21-TRIHYDROXYALLOPREGNANE3,20-DIONE AND ITS ESTERS OF HYDROCARBONCARBOXYLIC ACIDS HAVING FROM ONE TO EIGHT CARBON ATOMS INCLUSIVELY.
Claim 2
Dependent Claim
23 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 11A,17A,21-TRIHYDROXYALLOPREGNANE3,20-DIONE AND ITS ESTERS OF HYDROCARBONCARBOXYLIC ACIDS HAVING FROM ONE TO EIGHT CARBON ATOMS INCLUSIVELY.
References Cited (Backward Citations)
US2602769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |