US3119749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 1-dehydro steroids
Assignee: Olin Corp
•
Filing: 1962-04-10
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Granted: 1964-01-28
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Expires: 1982-04-10
Abstract
No abstract record available.
Inventors
- 👤 Richard W Thoma
- 👤 John W Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:11
CPC Classifications
C; C12; C12P; C12P33/00; C07; C07J; C07J5/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/843
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS FOR THE ENZYMATIC 1-DEHYDROGENATION OF A STEROID OF THE 16A, 17A-DIHYDROXY 3-KETO-$4-PREGENE SERIES TO ITS 1-DEHYDRO DERIVATIVE BY TREATMENT WITH ENZYMES OF A 1-DEHYDROGENATING MICROORGANISM, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE PROCESS IN AN AQUEOUS MEDIUM EMPLOYING AS THE STEROID SUBSTRATE A WATER-SOLUBLE 16, 17-CYCLOBORATE ESTER OF A STEROID OF THE 16A,17A-DIHYDROXY-3-KETO-$4-PREGNENE SERIES.
Claim 2
Dependent Claim
56 words
IN A PROCESS FOR THE ENZYMATIC 1-DEHYDROGENATION OF A STEROID OF THE 16A, 17A-DIHYDROXY 3-KETO-$4-PREGENE SERIES TO ITS 1-DEHYDRO DERIVATIVE BY TREATMENT WITH ENZYMES OF A 1-DEHYDROGENATING MICROORGANISM, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE PROCESS IN AN AQUEOUS MEDIUM EMPLOYING AS THE STEROID SUBSTRATE A WATER-SOLUBLE 16, 17-CYCLOBORATE ESTER OF A STEROID OF THE 16A,17A-DIHYDROXY-3-KETO-$4-PREGNENE SERIES.
References Cited (Backward Citations)
US2844513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |