Patent US3072686A successfully refreshed from Google Patents.
US3072686A
Expired / Lapsed
US
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16alpha-alkyl-pregnane compounds and process for their manufacture
Assignee: BASF Corp
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Filing: 1959-10-08
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Granted: 1963-01-08
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Expires: 1979-10-08
Abstract
No abstract record available.
Inventors
- 👤 Wettstein Albert
- 👤 Heusler Karl
- 👤 Kebrle Jindrich
- 👤 Meystre Charles
- 👤 Wieland Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:58
CPC Classifications
C; C07; C07J; C07J13/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
PROCESS FOR THE MANUFACTURE OF 16A-LOWER ALKYLPREGNANE-COMPOUNDS BY TREATING $16-20-KETO-PREGNENE COMPOUNDS WITH A LOWER ALKYL MAGNESIUM HALIDE IN THE PRESENCE OF A CUPROUS HALIDE, WHEREIN THE REACTION WITH THE LOWER ALKYL MAGNESIUM HALIDE AND THE CUPROUS HALIDE IS PERFORMED IN THE PRESENCE OF TETRAHYDROFURANE AND IN THE ABSENCE OF ALKYL HALIDE, AND THE RESULTING 20-METALENOLATE IS DECOMPOSED.
Claim 2
Dependent Claim
57 words
PROCESS FOR THE MANUFACTURE OF 16A-LOWER ALKYLPREGNANE-COMPOUNDS BY TREATING $16-20-KETO-PREGNENE COMPOUNDS WITH A LOWER ALKYL MAGNESIUM HALIDE IN THE PRESENCE OF A CUPROUS HALIDE, WHEREIN THE REACTION WITH THE LOWER ALKYL MAGNESIUM HALIDE AND THE CUPROUS HALIDE IS PERFORMED IN THE PRESENCE OF TETRAHYDROFURANE AND IN THE ABSENCE OF ALKYL HALIDE, AND THE RESULTING 20-METALENOLATE IS DECOMPOSED.
References Cited (Backward Citations)
US2773079A
Cited
US2694078A
Cited
US2751398A
Cited
US2870174A
Cited
US2986572A
Cited
US2944070A
Cited
US2970157A
Cited
US2983737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |