US2884429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal enolates of 20-keto-21 (trifluoroacetyl) steroids
Assignee: Pharmacia and Upjohn Co
•
Filing: 1954-12-17
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Granted: 1959-04-28
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
- 👤 Alan H Nathan
- 👤 John A Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:30
CPC Classifications
C; C07; C07J; C07J9/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF (1) STEROIDS REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
14 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF (1) STEROIDS REPRESENTED BY 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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |