Patent US2584271A successfully refreshed from Google Patents.
US2584271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid derivatives and method for producing the same
Assignee: GD Searle LLC
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Filing: 1948-06-19
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Granted: 1952-02-05
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Expires: 1968-06-19
Abstract
No abstract record available.
Inventors
- 👤 Max N Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:37
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR THE MANUFACTURE OF 16, 17-DIHYDROXY STEROIDS OF THE ANDROGEN AND ESTROGEN SERIES, WHEREIN THE CORRESPONDING STEROID HAVING A KETONE GROUP IN AT LEAST ONE OF THE C16 AND C17 POSITIONS AND A HYDROXYL GROUP IN THE OTHER IS REDUCED BY A BASE METAL AMALGAM IN THE PRESENCE OF A HYDROGEN DONOR.
Claim 2
Dependent Claim
54 words
A PROCESS FOR THE MANUFACTURE OF 16, 17-DIHYDROXY STEROIDS OF THE ANDROGEN AND ESTROGEN SERIES, WHEREIN THE CORRESPONDING STEROID HAVING A KETONE GROUP IN AT LEAST ONE OF THE C16 AND C17 POSITIONS AND A HYDROXYL GROUP IN THE OTHER IS REDUCED BY A BASE METAL AMALGAM IN THE PRESENCE OF A HYDROGEN DONOR.
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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |