US2521586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of the 17-monobenzoate ester of androstene diol
Assignee: Nopco Chemical Co
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Filing: 1949-06-01
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Granted: 1950-09-05
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Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Levy Joseph
- 👤 Kapp Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR THE PRODUCTION OF THE 17-MONOBENZOATE ESTER OF $5,6-ANDROSTENE-3,17-DIOL WHICH COMPRISES PARTIALLY SAPONIFYING IN A SOLVENT MIXTURE COMPRISING METHYLENE CHLORIDE AND METHYL ALCOHOL A DIESTER OF THE ANDROSTENE DIOL ESTERIFIED ON THE 3 POSITION WITH AN ACYL RADICLE SELECTED FROM THE GROUP CONSISTING OF CH3CO-, C2H5COAND C3CH7CO- AND ESTERIFIED ON THE 17 POSITION WITH A BENZOYL GROUP.
Claim 2
Dependent Claim
59 words
A PROCESS FOR THE PRODUCTION OF THE 17-MONOBENZOATE ESTER OF $5,6-ANDROSTENE-3,17-DIOL WHICH COMPRISES PARTIALLY SAPONIFYING IN A SOLVENT MIXTURE COMPRISING METHYLENE CHLORIDE AND METHYL ALCOHOL A DIESTER OF THE ANDROSTENE DIOL ESTERIFIED ON THE 3 POSITION WITH AN ACYL RADICLE SELECTED FROM THE GROUP CONSISTING OF CH3CO-, C2H5COAND C3CH7CO- AND ESTERIFIED ON THE 17 POSITION WITH A BENZOYL GROUP.
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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |