US2882282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing 3-keto-delta4, 6-steroid compounds from 3-keto a-ring saturated 6-dihydro steroid compounds
Assignee: Pfizer Inc
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Filing: 1957-07-17
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Granted: 1959-04-14
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Expires: 1977-07-17
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Agnello
- 👤 Gerald D Laubach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS FOR THE PRODUCTION OF A 3-KETO-$46-STEROID COMPOUND HAVING FROM EIGHTEEN TO TWENTY-ONE CARBON ATOMS IN THE STEROID NUCLEUS WHICH COMPRISES REACTING THE CORRESPONDING 3-KETO A-RING SATURATED 6-DIHYDRO STEROID COMPOUND WITH AT LEAST TWO MOLAR PROPORTIONS OF A QUINONE HAVING AN OXIDATION-REDUCTION POTENTIAL LESS THAN -0,5, AT AN ELEVATED TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 190* C. IN AN ALKANOL SOLVENT HAVING UP TO NINE CARBON ATOMS AND A BOILING POINT OF AT LEAST ABOUT 100* C.
Claim 2
Dependent Claim
79 words
A PROCESS FOR THE PRODUCTION OF A 3-KETO-$46-STEROID COMPOUND HAVING FROM EIGHTEEN TO TWENTY-ONE CARBON ATOMS IN THE STEROID NUCLEUS WHICH COMPRISES REACTING THE CORRESPONDING 3-KETO A-RING SATURATED 6-DIHYDRO STEROID COMPOUND WITH AT LEAST TWO MOLAR PROPORTIONS OF A QUINONE HAVING AN OXIDATION-REDUCTION POTENTIAL LESS THAN -0,5, AT AN ELEVATED TEMPERATURE BETWEEN ABOUT 100* C. AND ABOUT 190* C. IN AN ALKANOL SOLVENT HAVING UP TO NINE CARBON ATOMS AND A BOILING POINT OF AT LEAST ABOUT 100* C.
References Cited (Backward Citations)
US2739974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |