US2656368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
delta17-20-cyano-11-hydroxypregnenes
Assignee: Merck and Co Inc
•
Filing: 1952-01-08
•
Granted: 1953-10-20
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Robert P Graber
- 👤 Norman L Wendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:43
CPC Classifications
C; C07; C07J; C07J41/00; C07J21/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
$17-20-CYANO-PREGNENE COMPOUNDS HAVING A HYDROXY SUBSTITUENT ATTACHED TO THE C-11 CARBON ATOM.
Claim 2
Dependent Claim
12 words
$17-20-CYANO-PREGNENE COMPOUNDS HAVING A HYDROXY SUBSTITUENT ATTACHED TO THE C-11 CARBON ATOM.
References Cited (Backward Citations)
US2558785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |