US2736734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
delta1,4-3,20-diketo-11-oxygenated-17,21-dihydroxy-pregnadiene 21-tertiary butyl acetates and 9-fluoro derivatives thereof
Assignee: Merck and Co Inc
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Filing: 1955-01-14
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Granted: 1956-02-28
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Expires: 1975-01-14
Abstract
No abstract record available.
Inventors
- 👤 Lewis H Sarett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:10
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |