Patent US2548922A successfully refreshed from Google Patents.
US2548922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of steroidal hydroxy ketones
Assignee: Parke Davis and Co LLC
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Filing: 1949-12-03
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Granted: 1951-04-17
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Expires: 1969-12-03
Abstract
No abstract record available.
Inventors
- 👤 Romeo B Wagner
- 👤 James A Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:26
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
PROCESS WHICH COMPRISES REACTING A STEROID HAVING A RING D THE STRUCTURE,
Claim 2
Dependent Claim
12 words
PROCESS WHICH COMPRISES REACTING A STEROID HAVING A RING D THE STRUCTURE,
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |