US2628966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of steroid ketones with alkali metal borohydride
Assignee: Merck and Co Inc
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Filing: 1950-11-25
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Granted: 1953-02-17
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Expires: 1970-11-25
Abstract
No abstract record available.
Inventors
- 👤 Robert P Graber
- 👤 Norman L Wendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:50
CPC Classifications
C; C07; C07J; C07J75/00; C07J1/00; C07J1/0003; C07J1/0011; C07J41/00; C07J41/0005; C07J9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE PROCESS OF REDUCING A KETONE GROUPING IN A KETO-SUBSTITUTED STEROID COMPOUND CONTAINING AT LEAST ONE UNSATURATED CARBON TO NITROGEN LINKAGE, WITHOUT SUBSTANTIALLY EFFECTING SAID CARBOND TO NITROGEN LINKAGE, WHICH COMPRISES REACTING SAID KETO-SUBSTITUTED STEROID COMPOUND WITH AN ALKALI METAL BOROHYDRIDE THEREBY FORMING THE CORESPONDING HYDROXY-SUBSTITUTED STEROID COMPOUND.
Claim 2
Dependent Claim
48 words
THE PROCESS OF REDUCING A KETONE GROUPING IN A KETO-SUBSTITUTED STEROID COMPOUND CONTAINING AT LEAST ONE UNSATURATED CARBON TO NITROGEN LINKAGE, WITHOUT SUBSTANTIALLY EFFECTING SAID CARBOND TO NITROGEN LINKAGE, WHICH COMPRISES REACTING SAID KETO-SUBSTITUTED STEROID COMPOUND WITH AN ALKALI METAL BOROHYDRIDE THEREBY FORMING THE CORESPONDING HYDROXY-SUBSTITUTED STEROID COMPOUND.
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) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |