US2541106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pregnane derivatives and process
Assignee: Merck and Co Inc
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Filing: 1949-02-12
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Granted: 1951-02-13
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Expires: 1969-02-12
Abstract
No abstract record available.
Inventors
- 👤 Hastings Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
C; C07; C07J; C07J41/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS WHICH COMPRISES REACTING OSMIUM TETOXIDE WITH A $17-PREGNENE COMPOUND HAVING A CYANO RADICAL ATTACHED TO THE C-20 CARBON ATOM AND HAVING AT LEAST ONE NUCLEAR HYDROXY SUBSTITUENT, REACTING THE OSMATE ESTER THUS OBTAINED WITH AN OXIDIZING AGENT THEREBY OXIDIZING SAID NUCLEAR HYDROXY SUBSTITUENT TO A KETO RADICAL, AND REACTING THE RESULTING KETO-SUBSTITUTED OSMATE ESTER WITH A HYDROLYZING AGENT.
Claim 2
Dependent Claim
60 words
THE PROCESS WHICH COMPRISES REACTING OSMIUM TETOXIDE WITH A $17-PREGNENE COMPOUND HAVING A CYANO RADICAL ATTACHED TO THE C-20 CARBON ATOM AND HAVING AT LEAST ONE NUCLEAR HYDROXY SUBSTITUENT, REACTING THE OSMATE ESTER THUS OBTAINED WITH AN OXIDIZING AGENT THEREBY OXIDIZING SAID NUCLEAR HYDROXY SUBSTITUENT TO A KETO RADICAL, AND REACTING THE RESULTING KETO-SUBSTITUTED OSMATE ESTER WITH A HYDROLYZING AGENT.
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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |