Patent US2981659A successfully refreshed from Google Patents.
US2981659A
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Method for the microbiological conversion of pregnane series steroids
Assignee: Pharmacia and Upjohn Co
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Filing: 1959-05-01
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Granted: 1961-04-25
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Expires: 1979-05-01
Abstract
No abstract record available.
Inventors
- 👤 Gunther S Fonken
- 👤 Herbert C Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
C; C12; C12P; C12P33/00; C07; C07J; C07J17/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/83; Y10S435/843; Y10S435/863; Y10S435/866; Y10S435/911; Y10S435/929
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS FOR THE MIRCROBIOLOGICAL OXIDATION OF THE NUCLEUS OF A 20-KETO STEROID OF THE PREGNANE SERIES WITH A MICROORGANISM WHICH PRODUCES REACTION BY-PRODUCTS RESULTING FROM THE ALTERATION OF HTE 20-KETO FUNCTION BY THE MICROORGANISM, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS STARTING STEROID OF KETONIC FUNCTIONAL DETIVATIVE OF THE 20KETO STEROID SELECTED FROM THE GROUP CON SISTING OF 20-ACETALS AND 20ENOL ETHERS THEREOF AND CONDUCTING THE OXIDATION UNDER SUBSTANTIALLY NONACIDIC CONDITIONS.
Claim 2
Dependent Claim
72 words
IN A PROCESS FOR THE MIRCROBIOLOGICAL OXIDATION OF THE NUCLEUS OF A 20-KETO STEROID OF THE PREGNANE SERIES WITH A MICROORGANISM WHICH PRODUCES REACTION BY-PRODUCTS RESULTING FROM THE ALTERATION OF HTE 20-KETO FUNCTION BY THE MICROORGANISM, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS STARTING STEROID OF KETONIC FUNCTIONAL DETIVATIVE OF THE 20KETO STEROID SELECTED FROM THE GROUP CON SISTING OF 20-ACETALS AND 20ENOL ETHERS THEREOF AND CONDUCTING THE OXIDATION UNDER SUBSTANTIALLY NONACIDIC CONDITIONS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |