Patent US2598648A successfully refreshed from Google Patents.
US2598648A
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Process for the production of compounds of the androstane series
Assignee: CIBA PHARM PROD Inc
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Filing: 1950-06-26
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Granted: 1952-05-27
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Expires: 1970-06-26
Abstract
No abstract record available.
Inventors
- 👤 Miescher Karl
- 👤 Wieland Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:20
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE ANDROSTANE SERIES, WHICH COMPRISES SUBJECTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF NUCLEARLY SATURATED 3-HYDROXY-20KETO-PREGNANES AND NUCLEARLY UNSATURATED 3HYDROXY-20-KETO-PREGNANES, THE DOUBLE BONDS OF WHICH ARE TEMPORARILY PROTECTED, TO THE ACTION OF AN AROMATIC PER-ACID SELECTED FROM THE GROUP CONSISTING OF PERBENZOIC ACID AND MONOPERPHTHALIC ACID IN THE ABSENCE OF AN ESTERIFYING AGENT, AND SEPARATING THE RESULTANT PRODUCTS.
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE PREPARATION OF A COMPOUND OF THE ANDROSTANE SERIES, WHICH COMPRISES SUBJECTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF NUCLEARLY SATURATED 3-HYDROXY-20KETO-PREGNANES AND NUCLEARLY UNSATURATED 3HYDROXY-20-KETO-PREGNANES, THE DOUBLE BONDS OF WHICH ARE TEMPORARILY PROTECTED, TO THE ACTION OF AN AROMATIC PER-ACID SELECTED FROM THE GROUP CONSISTING OF PERBENZOIC ACID AND MONOPERPHTHALIC ACID IN THE ABSENCE OF AN ESTERIFYING AGENT, AND SEPARATING THE RESULTANT PRODUCTS.
References Cited (Backward Citations)
US2304836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |